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M81MHF The 1981 Bulletin from the British Museum of Natural History highlights important studies in botany, focusing on plant species, research developments, and botanical collections.

3A0EH6J Bulletin de la Société Mycologique de France, Epinal, La Société, 1885-1903, France, Fungi, Periodicals, Mycology, This illustration presents a series of detailed studies of Dendrythium thoraleides, showcasing various morphological aspects of the species. The labeled figures depict elongated, segmented structures that suggest a microscopic view of the organism, highlighting its distinctive features. Each numbered representation provides insight into the anatomy and variations within the species, contributing to a better understanding of its biological characteristics and classification. The sy

2AWRHAC Bulletin of the University of Rhode Island : catalog number . LADD LABORATORY—SKKLKTON ROOM.. THE BIOLOGICAL LABORATORY. COLLEGE CATALOGUE. 73 steadily increased. Each student is given the use of compound anddissecting microscopes and necessary instruments for laboratorywork. Subjects. I. General Zoology.—Discussion of the more important laws of Biology andthe dissection of representatives of the more important Phyla. Two laboratoryand one recitation credits, first term. Required of Sophomores in Agriculture, HomeEconomics, and Applied Science. II. General Zoology (continued).—Special attentio

2AFJTF1 . Bulletin. Article VI.—Some Recent Changes in Illinois River Biology* ByStephen A. Forbes and Robert Earle Richardson. The principal causes of change in the biological environment of theIllinois River which have come in since 1899 are the opening of the drain-age canal of the Sanitary District of Chicago in January, 1900, a greatincrease in the amount of Chicago sewage emptied into the stream, andan extensive reclamation of the river bottoms for agricultural uses; andit is our present purpose to trace the principal eiTects of these changesupon the life of the stream. Although this study has h

RT05G2 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 7O MARY J. ROSS. the large cesophageal glands. But, whatever they may be as to homology, all of the glands of the stomach are alike in the for- mation of their early stages. The early stages in the formation of the gastric glands in Desmognathus are easy to discern, as in this form there is com- paratively little yolk present to obscure the cell outlines. The first traces of the future glands are found in a larva of 11 mm. total length. The cells are at first apparently many layers thick, but on careful inspection it may be

RT05FW . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 322 A. RICHARDS. cytoplasm, for the nuclei do not exhibit any such striking quan- titative differences as does the cytoplasm. The cells do not seem to form a syncytium of which the ground substance is a part, as some writers have stated. The evidence seems to me to indicate that the ground substance bears a relation to the paren- chyma cells similar to that borne by the intercellular matter of connective tissue, for example, to the connective-tissue corpuscle. That the parenchyma cells have definite boundaries is brought out

RT05FY . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. i-i... p. B..U.| l'i .111.1 M . I l'i •; ! i ;. 1 v. tin- 1. -.ir; a, till-' '. : :T«m tin- -pin. I!. ••! l;i^. 15. i 7 I • -i lal pl.itc, 2S > liti'ii,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray,

RT05G1 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. i go L. V. MORGAN. tion was in every case rapidly taking place, and where checks were possible, pieces with and without ganglia were in the same con- dition. For example, in 5a, half-worms retaining one ganglion,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Ma

RT05FM . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 14 18. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05E8 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 10 sec 1 sec FIGURE 7. Oscillographic records of responses of Rcnilla to electrical stimulation, (a) Eighteen (?) successive responses to serial stimuli delivered at I/sec; light trace above (left to right), stimuli below; sweep 2 sees/cm division; first response apparent after third shock; (b.) Response to stimuli delivered at 5/sec; upper trace, light detected from large area of rachis; lower trace, light detected from small area through 1-i mm light guide. The duration of the facilitated state was variable also. The most

RT05EJ . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05F8 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PLATE I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05FP . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. o ¥. Psithyrus ashtoni I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05F0 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NITROGEN TENSION IN SWIMBLADDER 181 Airtightness vas ascertained by pressing on the plunger while holding the syringe under water. The sample was usually analyzed within a few hours and did not change detectably during 24 hours when analyzed to an accuracy of 0.02 per cent. Due to the considerable biological spread in the data and the error from the un- avoidable delay in getting the sample, it was soon found that the analyses could be made much quicker and simpler and still sufficiently accurately by using the capil- lary

RT05F9 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 352 A. E. HOPKINS muscle, labial palps, and viscera, from the lacunae of which it is col- lected and carried to the excretory organs. The heart also pumps blood directly into the marginal arteries of the mantle lobes. From the ex- cretory organs the accessory hearts force the blood into the gills and into the marginal arteries, which therefore receive both arterial and venous blood. It is remarkable that such large vessels as the marginal arteries should receive both types of blood and, since the lacunae of the mantle carry

RT05EW . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. o" 4 "00" 12'30P. 24'00" 38/00" FIGURE 15. Two vegetal holes. The furrow cuts in on one side of the holes. In spite of the fact that the furrow passes quite close to the holes, no change is brought about in their shape. They vanish later. Note also that the direction of the line connecting the two holes is nearly horizontal in the beginning, becoming almost vertical after cleavage is complete. This shows that vegetal cytoplasm before cleavage comes around to the side during cleavage. up of the incipi

RT05FN . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. R. R. HUMPHREY. Though present, they have remained quiescent during the months preceding the extrusion of the spermatozoa; with the emptying oi the lobule, however, or even somewhat previously in many urodeles,. FIG. 2. Longitudinal section of a Desmognathus testis, showing a region somewhat posterior to that pictured in Fig. i. Developing lobules are here well defined and their relation to the collecting duct clearly indicated. they begin to multiply. By increase in their numbers the emptied lobule is in time completely reg

RT05EN . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 16 14 17 15. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05F7 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 236 JOHN L. FULLER is in accord with the observation of Marshall (1924), who notes that Calanus captured by tow-net hauls in the early morning had full gut?, while those caught later in the day often had no food in their ali- mentary tracts. Figure 1 represents the course of tvo experiments (8 and 11 j which show this rhythm. It is not, however, an invariable. KK;. 1. Diurnal feeding rhythm of Calanns. Stippled areas represent hours between 8 P.M. and 8 A.M. The scale of Kxperiment 15 i> adjusted by adding 0.5 to logarit

RT05E9 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 114 N. B. RUSHFORTH AND F. HOFMAN 2. Concerted tentacle flexions In the majority of hydra investigated, an Artemia placed on a single tentacle was engulfed within 80-100 seconds. However, concert activity initiated with the first tentacle movements, continues long after the prey has been swallowed (Fig. 2, upper graph). Only 15-20 minutes after the prey has been engulfed does the concert frequency decrease to the pre-feeding level. LIVE ARTEMIA CAUGHT. =i 80 cc LJ o 2 O o u o QC UJ 00 30 45 TIME IN MINUTES ARTEMIA HOMOGENAT

RT05EK . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 308 DONALD M. WOOTTON. PLATE II. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laborato

RT05EC . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 492 RALPH R. HATHAWAY Species specificity of respiratory activators Although the agglutination of spermatozoa by egg water is highly specific (Lillie, 1919; Metz, 1945; Tyler, 1948), there has been no clear demonstration of specificity among activators of sperm motility and respiration. A specific activator was thought to occur in starfish egg water (Loeb, 1915), but it was later demon- strated that starfish spermatozoa are virtually immotile in both sea water and egg water (Metz, 1945). In the same paper, Loeb also reported

RT05F4 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. A.. B. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05EF . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC REGULATION IN SHRIMPS 565 RESULTS Juvenile and subadult aztccus and du-oraniin are hypotonic to sea water in a salinity range of 30-34/ir in summer in a temperature range of 23-31° C. This was shown by a comparison of the melting points of blood from shrimps and water taken from outside holding tanks at the inception of each weekly experiment. This find- ing is in accord with the account for a number of decapod crustaceans (supra cit.). Results of six weekly experiments on aztccus ranging in total length from 42-100

RT05FJ . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PROTOZOA AND THK UTRICLES OF UTRICULARIA. 243. ^ «J < Ul O o 3 O. CJ 0) 0) O •o a rt a T3 O £3 r- X ci] M V. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Red

RT05F2 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FOOD HABITS OF ENTAMOEBA 327. PLATE I All figures are from fixed and stained slides. They have been drawn with the aid of a camera lucida at an initial magnification of X 3000 and reduced about one- third in printing. Figures 1-33 are of Entainoeba tniiris and Figs. 34-42 are of E. ranarmn.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biologica

RT05FE . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05FK . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05ET . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 190 HILARY R MOORK. TIME (TWENTY-MINUTE INTERVALS) FIGURE 9. Bathygram showing morning descent of scattering layer onto bottom at 200 to 250 fathoms. Atlantis cruise 154, 7 Apr., 1949; 25°51'N., 79°41i/2'W. 15 *^ ^^^— £L ^ L — — so- T • • • ^m y 40 J -*• 40- 80- 120-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hol

RT05FR . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NUMBER OF STAMENS AND PISTILS IN FICARIA. II. FIG. i. Average numbers of stamens in flowers with various numbers of pistils and average numbers of pistils in flowers with various numbers of stamens. Empirical and smoothed values. Italian series. TABLE III. CORRELATION BETWEEN TOTAL SPOROPHYLLS AND NUMBER OF STAMENS AND PISTILS AND BETWEEN TOTAL SPOROPHYLLS AND DEVIATION OF THE NUMBER OF STAMENS AND PISTILS FROM THEIR PROBABLE VALUE. Series. Correlation Between Sporophylls and Stamens. »v rEr. Correlation Between Sporophylls

RT05ED . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 18 DAVID L. DENL1NGER 5. orgyrostomo i- i i -*n i '. 20 40 60 80 100 120 140 160 180 200 220 240 DAYS AT 17° C FIG i'RE 3. Duration of diapause in Sarcophaga species and strains at 25° C after various lengths of time at 17° C. Points on axes are from Table II; all other points represent the mean of 25-30 pupae. d.f. =: 446, M.S. =: 164). The estimated regression equation is Y = 69.41 - • 4.78X + 0.16X2, where X is coded temperature. By providing diapausing pupae with a combination of 17 and 25° C, the dura- tion of diapause

RT05FD . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05FC . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. STUDIES ON EUGLENOID FLAGELLATES 283 the growth of Metazoa. The differential form of this equation is dx kp , . dt 1 +p V)(A •-*), (Equation 4) where p is the constant proportion between nuclear and cytoplasmic increment and b/p is the excess of nuclear material which is present at the initiation of development, that is at the moment of fertilization, Graph A Graph C. GrapK B D. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appear

RT05EE . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SECONDS 8- 7- 6- 5- 4- 3- 2- 13 j.! .! , SECONDS. FIGURE 8. Vibragram (left) and section (right) of snapping shrimp noise. FIGURE 9. Vibragram showing snapping shrimp "volleys." FIGURE 10. Vibragram and section of water noise. FIGURE 11. Vibragram of snapping shrimp noise with water noise at a minimum. FIGURE 12. Vibragram of snapping shrip noise at Bimini, Bahama Islands. FIGURE 13. Vibragram and section of a single Synalpheiis mimis snap.. Please note that these images are extracted from scanned page images that

RT05D5 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05CP . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 156 P EMSCHERMANN FFS METEOR CRUISE XI-4 STA'RONS OF VAN VEEN GRAB AND JUAURANGULAR DREDGE. Figure 2. Station map of the Meteor cruise XI-4 in the Bransfield Strait. taken aboard and. later on, compared with those of ran- dom samples of preserved specimens. These groups of measurements were not significantly different. Freehand sketches were made of living specimens. When ship con- ditions allowed, micrographs of living specimens were taken through the dissection microscope. Higher mag- nification micrographs were made from

RT05DB . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. MOLT STAGING IN PENAEUS VANNAME1 189. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Lab

RT05DD . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 188 S. M. CHAN KT AL. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05DA . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. I I I I I I I 1 I I 1 I 1 I I I I 18 0 6 Time of day Figure 3. The pattern of DimurplnKlyli asiatica emergence in Sep- tember-October (23 Sep.-? Oct. 1987). Collections were carried out from 18:00 to 06:00. Symbols as in Figure 1. peared after sunset and before sunrise. Thereafter, those peaks of activity disappeared, and most of the emergence took place on the ebb tide (5-10 July). Compared with the data illustrated in Figure 1, the activity pattern in this season was not as clearly synchronized with the time of high water

RT05E5 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANTIGENS IN AMPHIBIAN EGG-JELLIES 331. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological La

RT05DF . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 190 G. O. MACKIE AND C. L. SINGLA cloacal aperture —zooid common cloaca. crampon " FIGURE 1. Diplosoma listerianium, cut-away drawing after Lahille (1890). The zooids hang by their oral siphons from the upper tunic layer and are anchored below by strands of tunic drawn up from the basal tunic layer, which is attached to the substrate by "crampons." Arrows show water flow. physiology (Bone and Mackie, 1982) the polarity of the electrical records is arranged so that negative events go up, positive down. General

RT05E0 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. V ?. 6a » /I .' *r A- FIGURES 5-6. '. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Lab

RT05D0 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 10. LM (A)and TEMs(B-F)ofeggsat 16 min after insemination. A. Section through the animal pole (top) and zygote nucleus (arrow). The yolk remains patchy near the animal pole. Scale bar: 20 ^m. B. The proximal pan of the second polar bod (PB), which has detached from the egg. Scale bar: 5 fim. C. The polar body and egg, although no longer in cytoplasmic continuity, remain very tightly apposed (arrows). Scale bar: 1 nm. D. The distal part of the second polar body. Some of the chromosome-containing vesicles have fused in

RT05DJ . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 302 ROGER I. E. NEWELL ET AL. RESULTS Long Island populations The energy content of the seston at Stony Brook, expressed as joules per liter was consistently greater during the summer (May to October) than at Shinnecock (Fig. 2). During the remainder of the year there were sharp fluctuations in the energy content of the seston at both localities. The mean salinity at Stony Brook was 24.2%o ± 2.0%o (S.D.) and the temper- ature range was -0.5°C to 26.5°C (Fig. 3). Mean salinity (29.1%o ± 1.3%o) was higher at Shinnecock, althou

RT05DY . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 126 J. B. WITTENBERG AND B. A. WITTENBERG A A. V V. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine

RT05DK . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. T=1.6 Stage Ilia. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RT05DG . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ANTARCTIC ECHINOID REPRODUCTION 131. 100 (jm FIGURE 1. Early eight-arm pluteus of Sterechinus neumayeri shortly after the formation of the pre- oral pair of arms (indicated by arrow). Scale bar = 100 DISCUSSION Embryonic and larval development Compared to other species that have been studied, the developmental stages of Sterechinus neumayeri are most similar in shape and size to those of the temperate echinoid, Echinus esculentus (MacBride, 1903). However, the formation of spines on the external surface of the larvae, separa

RT05DX . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BARNACLE CENTRAL NEURONS 143 C 4-6. FIGURE 1. Diagram of the Cirral-CNS-Adductor Muscle preparation from BaJanus cariosns. ANT represents antennular nerve; ADD, adductor muscle; C4-6, cirri 4 through 6; CEC, circumesophageal connective; GS, great splanchnic nerve; MPR, median photoreceptor; VG, ventral ganglion. In view of the fact that this solution had a reduced amount of Na+ a control was run using a medium with the normal amount of Mg2+ and Ca2+, but with low Na This solution had the following composition: NaCl, 326 mM;

RT05D4 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 514 D. NEUMANN AND F. HEIMBACH t.0 20 a* C7> •o e 0 01. Dorset n= £51 (3 » > West Norway n= 760 (3). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield,

RT05D9 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 316 A J. F. HARRIGAN ET AL. sees B sees sees. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biolog

RT05DW . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LIFE CYCLES OF BUCEPHAL1D TREMATODES 299. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological

RT05E2 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CARBON MONOXIDE SECRETING TISSUE 4cS7 the gas. The gas cavity is sterile and therefore it was concluded that the monoxide gas is produced by the plant in its normal respiration (Rigg and Henry, 1935). There are many references to carbon monoxide production in other forms but these deal with special circumstances. Metz and Sjostrand (1954) recorded small amounts of the gas released by guinea pigs and rabbits, probably accounted for by the decomposition of hemoglobin. Yilks (1959) by grinding up alfalfa and putting it in a fl

RT05DN . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ONTOGENY OF SWIMMING IN AURELIA. I. marginal ganglia (Fig. 4B). As development proceeds, a stage is reached where all MGPs are conducted to other ganglia as in the medusa (Fig. 4C). Once beat- ing is established no particular pacemaker appears as the driving pacemaker. By BEATING A. lOjjV 10 sec I sec B. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Mar

RT05D7 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ZOOPLANKTON FEEDING ECOLOGY 379 100 - 80 ro O - 60 CO 40 20 0 100. DIATOMS DINOFLAGELLATES 3FEB 1982 (2000) I5DCC 1982 0930) I9NOV 1963 (1400) 22NOV 1983 (2035) 24NOV 1983 (0605) 24NOV 1983 (1340) 27NOV. 28NOV. 3ONOV I DEC. 1983 1983 1983 1983 (0900) (0905) (0920) (083O) Z O t 50 o a. O o O m o m , C - Coscinodiscus spp. DB-Ditylum brightwellii NC'Nitzschio dosterium PC-Prorocentrum compressum RA-Rtiizosolenia alata RF-Rhizosolenia fragilissima RS-Rhizosotenia stolterfothii SC'Skeletonema costatum TL'Thalassiosira spp. TX-Th

RT05D6 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ASCIDIAN ALKALINE PHOSPHATASE 227. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Labora

RT05CB . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OOCYTE MATURATION IN A BRACHIOPOD 333. labeled oocyte 3 h after removal from the ovary, showing a circular set of chromosomes (arrow) at the metaphase plate; scale bar = 10 ^m. (C) Photomicrograph taken 3h after an oocyte was removed from the ovary and directly transferred into 10 fj.M cytochalasin D to block follicle cell (fc) capping. Such CD- treated oocytes nevertheless undergo GVBD; scale bar = 50 ^/m. (D) Epon section (1 p.m) of a CD-treated oocyte at 3 h post-treatment, showing follicle cells (fc) still surrounding th

RT05CJ . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. STOMATOPOD VISUAL RHYTHMS 283 12 • 10 o D.. -3 -2 Log Intensity Figure 5. Response-vtTOu-intensity functions obtained during the experiments of Figure 2 (A) and Figure 4 (B). Functions were obtained at the times indicated by arrows on those figures; large circles indicate results obtained during subjective night and small circles, during subjective day. Open circles correspond to the first series and closed circles to the second. Photic intensities are relative to 3.44 x 1012 quanta cm"2 s' more difficult to detect, al

RT05CG . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Branchial Aperture Branchial Sac Gonads '. D B E. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine

RT05CH . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. a. O) o £ O) at # of days Figure 3. Changes in carbohydrate levels of cysts incubated aero- bically in four salinities of Mono Lake water at 4°C. (A) Glycerol synthesis is faster at higher salinities. (B) Trehalose breakdown is faster in the lower salinities. (C) Glycogen levels; only the lowest salinity, 50 g/l (1300 mOsm/kg). shows a net increase in glycogen. Points are x ± SD, n = 3. Refer to Figure 4 to determine percent hatch during the experiment. in hatching observed at the higher salinities used in these experiments

RT05CE . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 248 REPORTS FROM THE MBL GENERAL SCIENTIFIC MEETINGS. — R. aphaeroides-t B. Japonicum -R. r-adiobacter -R. sphaeroides — a -R. capsulatus - P. deni tr i f leans P. falcii Figure 1. Unrooted protein neighbor-joining tree (using gamma, a = 2), generated using MEGA, version 1.02 {reference 5). with bootstrap values (500 replicates) indicated. The scale bar represents 10 changes per 100 ammo acid positions. The ta.on labels are defined as follows (Genus species, GenBank accession #): human-H (Homo sapiens, X56351), beluga whale

RT05CR . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. GROWTH, RANK, AND MATURATION OF PRAWNS 383 1st appearance of mature. O---Q sexually mature •—• immature ?? I I I I 2 6 10 14 18 22 Weeks Figure 4. Median growth curves of females before and after sexual maturation.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole,

RT05C0 . The Biological bulletin. Biology; Zoology; Marine biology. RECENT PUBLICATIONS OF THE SYSTEMATICS-ECOLOGY PROGRAM, MARINE BIOLOGICAL LABORATORY. ''•"-H..,,; The indexed bibliography contains a 21 page illustrated introduction to the Cape Cod Region, and is intended to introduce scientists to major papers on the geology, ecology, behavior, and related literature of the Region, and to provide the begin- ning for more intensive literature searches. 208 p. 1966. $5.00. The keys, compiled and edited by R. I. Smith with the help of some 25 authors and contributors, are a general illustrated r

RT05CF . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. INTERSEGMENTAL FLEXIBILITY OF OPHIUROID ARMS 83 The metric of interest is #mjx, because we wish to know whether different ophiuroid species are differently lim- ited in their ability to flex between segments. Measure- ment error was determined by repetitive digitizing and was estimated to be ±2° (n = 900, SD = 2.1°). Results Results from this photographic survey allow interspe- cific comparisons of lateral flexibility between ophiuroid arm segments. These data do not address other plausible planes of rotation, such as oral-a

RT05C7 . The Biological bulletin. Biology; Zoology; Marine biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]

RT05C6 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 1 3 5 10 20 40 80 5mV 10s. 10 20 40 80 20 mV 10s Figure 4. (A) Intracellular recordings from a valve muscle fiber dunng stimulation of the valve nerve at site A (Fig. IC), and (B) at site B (Fig. IC) at different frequencies. (C) Record of biphasic membrane potential responses to stimulation of valve nerve at site A (Fig. IC). Only IJPs were produced below 5 Hz stimulation, summed IJPs followed by a small depolarization occurred at 5 and 10 Hz. and summed IJPs followed by repolarization during the period of stimulation and l

RT05C5 . The Biological bulletin. Biology; Zoology; Marine biology. 20.1 pp.i 26.7 p.pi. 31.1 p.p.! 20 25 30 20 25 30 20 25 30. M sm sn i s I TEMPERATURE C. Figure 7. Per cent mortality of each stage of Sesarma cinereum reared at different tempera- tures and salinities. S I-S IV = zoeal stages I-IV; M = megalops. differences due to temperature appear to be even more distinct. At 30° C, the majority of second stage zoeae have completed the third molt by the time the zoeae at 25° C. have begun this molt. Similarly, the zoeae at 25° C. have completed the third molt before those at 20° C. have begun. At

RT05CT . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ADENYLATE CYCLASE IN FW MUSSELS 601 400^ K^ 300 P i c HI 5 • o 100 0 0.0. 0.1 0.2 0.3 0.4 ENDOGENOUS CALCIUM (™M/I) FIGURE 3. Gill adenylate cyclase activity varies inversely as a function of endogenous calcium in Lignmia subrostrata. Each point represents the mean value of three determinations. • = basal (n = 33), A = 10 ^Mj dopamine (n = 24), and • = 10 pM/l serotonin (n = 32) AC activities with the lines fit by linear regressions. dogenous Ca linear regression was calculated to have a slope of — 130 pmol cAMP (mg protein

RT05CA . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. XYLOPLX FROM THE NORTH PACIFIC 79 have been sent to I. Bartsch of the Forschungsinstitul Senck- enberg, Germany, for study. Close examination of the preserved specimens revealed that in many, the marginal spines were angled relative to the plane of the body, minimizing their apparent length. Rather than risk damaging the specimens by removing the spines. specimens with detectably angled spines were eliminated from consideration. leaving only 18 individuals. Even with this reduced sample, nonlinear growth of the marginal spi

RT05BH . The Biological bulletin. Biology; Zoology; Marine biology. 20 -40 60 80 100 120 Mm. Ironi start ot exposure coo. 5 sec liciht exposure. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, P

RJY828 . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. collected from, Galeta Reef itself; it does not include species reported from nearby areas or the general Caribbean coast of Panama. Galeta Reef has been under intensive investigation for approximate- ly ten years. Most of the reef studies have been monitoring surveys designed to determine the species composition of the reef and to document temporal changes in the distribution and abundance of the biota of the reef. This reef was established as a biological reserve in the late 1960s. Intensive monitoring of th

RJX3JP . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Figure 5. With Arnfried Antonius (left) in 1970, loading a charter boat to explore reef sites in the Bahamas for the new IMSWE Program institutional applicants on a comprehensive, 10-year coral reef study. NSF awarded a project development grant, and Ian Macintyre was appointed lead investigator for the Smithsonian group. During phase one we conducted surveys of suitable study locations (Figure 5). We were looking for a site with high geological and biological diversity, low environmental impact by humans, and

RJX37N . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 208 resulted in substantial penalties for the destruction of back-reef habitats following another ship grounding, a first for damage to seaweed-dominated communities. Furthermore, some of our biological inventory and survey programs (conducted for state and federal agencies such as the Bureau of Land Management, Office of Water Resources Research, State of Hawaii, NOAA, NSF, National Park Service, Minerals Management Service) culminated in the development of standard large-scale monitoring methods (Fig. 10, Li

RJX2N0 . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 19. Mt. Olympus plateau" Pacific Ocean terminal KWAJALEIN Figure 25 surveys. Kwajalein Island. Dotted line shows route of shorebird The Avifauna of Kwajalein Atoll The principal ornithological summaries of the Marshall Islands are Baker's (1951) "Avifauna of Micronesia" and Amerson's (1969) "Ornithology of the Gilbert and Marshall Islands." The latter includes much of the information obtained by the Smithsonian Institution's Pacific Ocean Biological Survey Program (POBSP) during the ra

RJX1WT . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Fig. 3. The wind-rose diagram (a), and distribution of maximum mean wave heights (b) of Yongxing Island SEDIMENTARY EACIES MODEL OF CORAL REEFS IN THE SOUTH CHINA SEA Our investigation of the various types of modern coral reefs in the South China Sea revealed consistent zonation pattern for the reef-derived sediments, which are controlled by similar hydrological, geomorphological, biological and sedimentational parameters in this region (Wang Guozhong et a] 1982, 1986). There are 7 main sedimentary facies, whi

RJXKM2 . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Others Sponges 3 4 Gastropods 43% Echinoderms Kchinoderms 4%. Figure 2. Composition and biomass of the benthos While the high macrophytobenthic biomass in the centre of the lagoon, is a result of the high abundance of a cushion-shaped Cyanophyceae spp. at station 90. Animal biomass is significantly correlated with depth, and plant biomass with mud percentage (Table 2). Table 2. Relations between biological parameters and environmental parameters (ATP in ng/cm2 ; Chlorophyll a and Phaeopigments in mg/cm2 ; Dens

RJWT9F . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 77 and homeomorphs) and coarsely branched varieties (Pocillopora meandrina and homeomorphs). Septal structure cannot be discerned underwater, placing Pocillopora eydouxi into the P. meandrina group. Many of the species and their intergrading growth forms in this genus seem to be present at Canton. Large areas of Pocillopora could not be identified underwater in a reasonable time and (even if successful) probably would have little biological meaning due to the present taxonomic confusion of the group. As pointe

RJWP8X . Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. Zooxanthellate, constructional (Schuhmacher and Zibrowius, 1985) coral species were identified in the field by the author, using Almy and Carrion-Torres (1963), Roos (1971), Smith (1971), Wells (1973), and Humann (1983), in addition to the references given in Fenner (1988). The taxonomic system of Wells and Lang (1973) as modified by Cairns (1982) was used, since several of the species synonymized by Zlatarsky and Estallela (1982) are separable on biological criteria (e.g., Lang, 1971; van Moorsel, 1983; de We

RJD0GR . A century of biological research. Illinois. Natural History Survey Division. December, 1958 Bennett: Aquatic Biology 175 the warmouth was later published as an article of the Natural History Survey Bulletin (Larimore 1957). During the summer of 195(J Larimore, with the help of Leonard Durham and others, began an intensive investigation of the fishes in Jordan Creek, a small spring-fed, upland stream in V^ermilion County. This project marked the be- ginning of upland stream investigations as a continuous program of the Section of Aquatic Biology. Through the use of the electric seine and othe

RHPDJT . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. LONG. yellowish white ; legs yellowish brown, strongly infuscated ; knees yellow ; tibiae spurred, outer edge with a row of black lanceolate scales ; bases of tarsi light yellow ; first two joints subequal, the others shorter ; each joint with a graduated row of short bristles on the plantar surface ; empodium strap-shaped, bristly-fringed, nearly as long as claws, claws subequal. Neuration of wings ' as follows : Costal vein strong, terminating distinctly before the middle of the wing, pilose except fora small naked spot ne

RHPDJE . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2O D. B. CASTEEL AND E. F. PHILLIPS. MEASUREMENTS. For the measurements taken in this work we have chosen veins and cells which in the bee differ from the typical hymen- opterous wing and which are to a certain extent typical of the bee in their direction and extent. In this choice we have fol- lowed the discussion of the venation of the Hymenoptera of Corrlstock and Needham.1 The measurements were : (i) Length of vein radius (7?) ; (2) diagonal length of cell radius-four (7?4); (3) length of vein media-two (^/,); (4) length

RHPDB1 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 84 .MARY |. ROSS. yolk disappears from them first, hence there is little space left for the formation of excretory ducts. The glands, then, are shorter and more flask-shaped than in the Desmognathus, though here too are found simple tubular glands. Bensley ('oo) describes the gastric glands of Amblystoma as "tubular downgrowths " of entoderm. "The anterior glands," he says, " are of a flask like shape and have a distinct lumen." }'/;^V £& lr^?,: Wrn^^Jawj •- "''. FIG. 21. a., the gland

RHPDBD . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE ORIGIN AND DEVELOPMENT OF GASTRIC GLANDS. 83 stage there takes place a rapid disappearance of yolk, a rapid multiplication of cells and a correspondingly rapid insinking of the surface epithelium to form the excretory duct. At the time of hatching there is, as before described for Desmognathus, a union of the gland fundus with the excretory duct, the cells show- ing marked mitoses at this point (Fig. 23, ;/). There are several points in which the Amblystoma appears to differ from the Desmognathus, The cells of the surfac

RHPDAM . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 3. Fn:. 4.. and the suctorial pad. This is further emphasized by the fact that F found nine tentacles having each three pads, apparently well developed and functional, and yet there was not the least sign of buds arising from any of the pads. These facts all point directly toward an unusual predisposition to a duplication of organs, and this perhaps offers the most satisfactory explanation of the budding and bifurcation of tentacles. C5 The bud showed a constriction near its middle region, but did not present externally

RHPDB4 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BREATHING MECHANISM OF THE LAMPREYS. 5 rior lobe are thus brought into the same plane as the central teeth of the funnel and function with them m rasping. The great freedom of movement of the end of the tongue necessary in rasp- ing is attained by its central cartilage (Fig. I, c') being attached by a sort of socket joint to the enlarged anterior end of the large lingual cartilage (Fig. I, «). The mouth cavity is short and curved, about five times as long as it is wide at its middle, and extends from the oral funnel to the p

RHPDBC . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 3. Fn:. 4.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RHPDAY . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RHPDAT . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. i.] STUDIES UPON HYDROMEDUSAE. 47 tion as a new outgrowth, there being only the slightest traces of pigment present. The growth was quite gradual, and not until about August 14 had it become fully formed and functional. In each case there had also been regenerated additional radial canals, as indicated in the figures. These appeared in connection with the lines of union, and were not at first. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - colo

RHPDB8 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. No. 4-] AMPHITHOK LONG1MAXA SMITH. 191 while studying the reactions of the animal to olfactory stimuli, and it was noticed that the regeneration of these appendages took place with considerable rapidity. Several observations were also made on specimens in which the antennae were found to have been accidentally lost. In a specimen (Fig. 2) observed August 13 the left antennule had been removed at the end of the second joint, and the right one at the end of the first. Of the second antennae the left member was off at the end o

RHPDAN . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. NERVOVS SYSTEM OF SCORPION. am. several papers, the last of which (1887) contains the results of all his work on the subject. He worked out the nerve cell- groups and the nerve fiber-tracts and came to the conclusion that there are two pre-cheliceral neu- romeres in the scorpion. But his observations do not seem to support his conclusions, for, while he showed that there are, cor- responding to these two neuro- meres, two pairs of optic lobes, he described their nerve-fiber tracts communicating with the interior of the "

RHPDAP . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 198 COLE. [VOL. II. of the Pycnogonids, largely as they regarded them homologous to the appendages of the Crustacea or to those of the Arach- nids. Dohrn obviates this difficulty by simply numbering them in their natural order, I-VII (Fig. i).1 For convenience I shall speak of the third pair as the ovigerous legs (these are absent in the female of Anoplodactylus), and of pairs IV-VII simply as the first, second, third, and fourth pairs of legs IV. VII I.-IG , Male Anoplodactylus lentns, dorsal aspect: at>., abdomen ; o

RHPDB7 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RHPDB6 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DEGENERATION IN THE LARV.E OF GONIONEMA. 1/5 In this condition the tissue of the creature was yellowish and translucent, with many inclusions of various sizes and shapes. The nuclei of the polyp were permanently visible, scattered unevenly through the substance. Vacuoles of varying size oc- curred in most cases, and a large number of foreign objects, such as bits of diatoms and disintegrating vegetable matter, par- ticles of sand, etc., lay in the protoplasmic matrix. This plasmodium showed most remarkable ability to move an

RHPDAX . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DEVELOPMENTAL STIMULI IN THE CESTODA. 135 scattered. The short period between the first contact with the outer water and the egg-laying indicates that the infection of the intermediate host is, by means of countless embryos, developed in the open ocean and not by the eating of the intact proglottids with their contained eggs. EGG DEVELOPMENT. On collecting the eggs laid by proglottids in the laboratory and placing them in dishes in which the sea-water can be kept reasonably pure, development ensues as far as the six-hooked e

RHPDBA . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 40 j. F. MCCLENDON. ci. dried them no sections came again. After this treatment off unless they were left too long in absolute alcohol. HISTORICAL. As early as 1870, Metschnikoff repre- sented the neuromeres as paired thicken- ings of the ectoderm on surface views of the scorpion embryo, there being one neu- romere for the segment bearing the eyes, one for the segment bearing the chelicera and so on for succeeding segments back to the point where the fold of the post-ab- domen hid them from view. A " long- itudinal furr

RHPDAW . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Fig. i Fig. 3. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RHPDA2 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. . Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory

RHPD9K . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 86 MARY J. ROSS. composed of several layers. Sections cut at 2 micra show that the epithelium is simple columnar; all the cells which reach the surface also rest upon the basement membrane, the " pyramidal cells" of Toldt ('80). In this respect the earlier stages in the pig also resemble those found in DcsinognatJuis and Ainblystoma »•£??"..-• "%* " '. .£ ^.;,..•;;•;;,/•;••;, >:S.V"'# I'L^-r •V •.--•---.. '-'•!•. 5./•."/. .-;>'.: : "$ '•?'•.•?*,••-,-•• :-.^ '•.- , V - . •'• ,V:

RHPDAF . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. I. Shows the antenna and fifth foot of a cyclops with thirteen-jointed an- tennae, A, A', Group I. The antenna and fifth foot of a cyclops with fourteen jointed antennre, B, B/, Group II. The antenna and fifth foot of a cyclops with seventeen-jointed antennae, C, C/, Group III. D shows the abdomen, the recepta- culum seminis and the caudal stylets characteristic of all the forms with thirteen, fourteen or seventeen-jointed antennre. E shows the large ramus of the maxilliped characteristic of the three forms. B also show

RHPDA9 . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIG. 19. suspected as canals. Later the deposition of pigment along their course pointed strongly to the conclusion that they were canals, though whether yet functional I am not able to say. In none of my experiments has there been any clear con- firmation of the results and conclusions of Bickford ('94) that in Hydroid regeneration the polyp, tentacles, etc., are produced. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of

RHPD9X . The Biological bulletin. Biology; Zoology; Biology; Marine Biology. '• rS .--•• •' - Gvvr^-'-w'TV.V • ;-;-. ••;• .-'- - - ' •"••. -f^ys /. "- -,>j.•;&&$ /•'..:•' •S^; l;$iidli i If «* '''"', ^••5^1. v : I, •':'?% FIG. 22. a. shows a gland fundus almost fully formed while as yet the epithelial cells, ep., are full of yolk, y. , and the duct, d. , is still a shallow pit; /. , lumen. The gland reaches almost to the free surface of the stomach. Obj. T's, Oc. 2. The general course of development of the earlier stages of the gastric glands of the pig takes place in exact