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Periostracum shell Stock Photos and Images
RMRGJ2WP–. Bulletin of the British Museum (Natural History). Zoology . Supplement.. n6 J. D. TAYLOR, W. J. KENNEDY & A. HALL. Figs. 76-77. Trigonacea : Neotrigonia margaritacea interior of the shell (76) and radial section (77) showing the general distribution of the shell layers. with a sharp shoulder joining it to the rest of the prism, with which it is in continuity. This boss may show concentric striations. The outer ends of each prism are separated from each other by a wedge of periostracum (Plate 13, figs. 1-2). The boss represents the initial spherulite from which each prism has developed, o
RMRHM58C–. The Biological bulletin. Biology; Zoology; Marine biology. Mg. Ca Figure 1. Scanning displays of Fe, Mn, Mg and Ca for a section of the shell of a speci- men of A. californiensis, and a diagram of the limits of the periostracum and CaCOs-containing region.. 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 Labor
![. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. HIGH SCHOOL ZOOLOGY. 229 and often by teeth on tlio valves. In front of tlie liingo aro the umbones, the first-formed parts of the valves; they gener- ally incline forwards. Tlu-eo layers may bo seen in the shell, the outer brown periostracum, the thick prismatic layer formed by the activity of the thickened borderofthe mantle (Fig. 155), and the nacreous or pearly layer, se- creted by the whole mantle surface. Pearls are the result of repeated '^ layers of this substance being form- ed round foreign par Stock Photo](https://c8.alamy.com/comp/RJ2HXF/an-introduction-to-zoology-microform-for-the-use-of-high-schools-zoology-zoologie-high-school-zoology-229-and-often-by-teeth-on-tlio-valves-in-front-of-tlie-liingo-aro-the-umbones-the-first-formed-parts-of-the-valves-they-gener-ally-incline-forwards-tlu-eo-layers-may-bo-seen-in-the-shell-the-outer-brown-periostracum-the-thick-prismatic-layer-formed-by-the-activity-of-the-thickened-borderofthe-mantle-fig-155-and-the-nacreous-or-pearly-layer-se-creted-by-the-whole-mantle-surface-pearls-are-the-result-of-repeated-layers-of-this-substance-being-form-ed-round-foreign-par-RJ2HXF.jpg ". An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. HIGH SCHOOL ZOOLOGY. 229 and often by teeth on tlio valves. In front of tlie liingo aro the umbones, the first-formed parts of the valves; they gener- ally incline forwards. Tlu-eo layers may bo seen in the shell, the outer brown periostracum, the thick prismatic layer formed by the activity of the thickened borderofthe mantle (Fig. 155), and the nacreous or pearly layer, se- creted by the whole mantle surface. Pearls are the result of repeated '^ layers of this substance being form- ed round foreign par Stock Photo")
RMRJ2HXF–. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. HIGH SCHOOL ZOOLOGY. 229 and often by teeth on tlio valves. In front of tlie liingo aro the umbones, the first-formed parts of the valves; they gener- ally incline forwards. Tlu-eo layers may bo seen in the shell, the outer brown periostracum, the thick prismatic layer formed by the activity of the thickened borderofthe mantle (Fig. 155), and the nacreous or pearly layer, se- creted by the whole mantle surface. Pearls are the result of repeated '^ layers of this substance being form- ed round foreign par
RMRHP149–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. -. FIGURES 5 AND 6. Radio-autographs of crystals of the shell of Pinna to show localization of P32 in the periostracum. FIGURE 7. Radio-autograph of crystals of Pinna showing localization of Ca45 within the crystals. Extraneous blackening of photo due to over-exposure. FIGURE 8. Large fragment of shell of Pinna showing differential uptake of Ca45 in re- generating shell. FIGURE 9. Surface view of shell of Pinna to show relation of crystals (light areas) to the surrounding periostracum shown as dark lines surrounding each cry
RMRH14R4–. Bulletin. Natural history; Natuurlijke historie. 30a 50jum.. Fig. 30a,b. Aragonitic spikes on the juvenile parts of the left valve of a Pliocene Gastrochaena (Gas- trochaena) from St. Petersburg, Florida (YPM 9597). Figure 30b is a higher magnification of the area circumscribed by the parallelogram in Fig. 30a. Note the absence of the spikes in the adult shell to the right (posterior) and bottom (ventral) in Figure 30a. exterior in the pandoracean Laternula. Although these calcified spikes are probably not entirely embedded within the periostracum in the shell posterior (Aller, personal comm
RMRG46KC–. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. FIGURE 180 PEARLY NAIAD (MARGARITIANA MARGARITIFERA) Description. Shell elliptical, elongate, one central tooth at the umbo of right valve, two teeth on left valve. Periostracum (the covering of the outside of the shell) glossy mahogany, usually worn off at hinge end. Inside color brilliant orange, purple, blue, green or pink. Color fades soon after death. To four inches.. Please note that these images are extracted from scanned page
RMRH1500–. Bulletin. Natural history; Natuurlijke historie. 34 PEABODY MUSEUM BULLETIN 41 Size and shape variation in spikes of S. rostrata i i I *. I 50 um. (spikes) 10 pm. (shell) Fig. 22. Size and shape variation of periostracal spikes in Spengleria rostrata. The measurements indicated by the spike shapes represent averages of at least 60 measurements for each area of the periostracum circled in the diagram. Only unabraded spikes were measured.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of th
![. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. Figure 116. Pismo clam patterns : Left, typical olam : center, three striped or trident; right, striped. Photograph hy Al Johns for Vernon M. Haden, San Pedro. The outside of the shell is covered with what appears to be a thin coat of varnish, the periostracum, Avliich eraeks and ])eels oft' wlien the shell is exposed to direct sunlight. The inside of the shell has a thin fleshy membrane attached to its whole surface. This membrane is Stock Photo](https://c8.alamy.com/comp/RG56FE/california-fish-and-game-fisheries-california-game-and-game-birds-california-fishes-california-animal-population-groups-pches-gibier-poissons-figure-116-pismo-clam-patterns-left-typical-olam-center-three-striped-or-trident-right-striped-photograph-hy-al-johns-for-vernon-m-haden-san-pedro-the-outside-of-the-shell-is-covered-with-what-appears-to-be-a-thin-coat-of-varnish-the-periostracum-avliich-eraeks-and-eels-oft-wlien-the-shell-is-exposed-to-direct-sunlight-the-inside-of-the-shell-has-a-thin-fleshy-membrane-attached-to-its-whole-surface-this-membrane-is-RG56FE.jpg ". California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. Figure 116. Pismo clam patterns : Left, typical olam : center, three striped or trident; right, striped. Photograph hy Al Johns for Vernon M. Haden, San Pedro. The outside of the shell is covered with what appears to be a thin coat of varnish, the periostracum, Avliich eraeks and ])eels oft' wlien the shell is exposed to direct sunlight. The inside of the shell has a thin fleshy membrane attached to its whole surface. This membrane is Stock Photo")
RMRG56FE–. California fish and game. Fisheries -- California; Game and game-birds -- California; Fishes -- California; Animal Population Groups; Pêches; Gibier; Poissons. Figure 116. Pismo clam patterns : Left, typical olam : center, three striped or trident; right, striped. Photograph hy Al Johns for Vernon M. Haden, San Pedro. The outside of the shell is covered with what appears to be a thin coat of varnish, the periostracum, Avliich eraeks and ])eels oft' wlien the shell is exposed to direct sunlight. The inside of the shell has a thin fleshy membrane attached to its whole surface. This membrane is
RMRGD07F–. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. Bulletin, So. Calif. Academy of Sciences Vol. 54, Part 1, 1955 and below the strongly but not acutely carinate periphery, the keel thus produced continuing to the lip; base flattened, the widely open vorticiform umbilicus contained about three times in the major diameter of the shell; suture deeply cut, almost channeled. Aperture transversely ovate, compressed, widest just below the columellar insertion; outer lip sharp, thin, though sometimes a little thicker in old specimens. Periostracum ap
RMRMJ8PT–. Annals of the South African Museum. Annale van die Suid-Afrikaanse Museum. 160 ANNALS OF THE SOUTH AFRICAN MUSEUM. 35 40 Length (mm) 50 55 60 Fig. 5. Diagram relating shell width to shell length for Caelatura kunenensis (open circles) and Caelatura mossanbicensis (solid circles) by means of linear regression lines fitted by the method of least squares. Juvenile C. mossambicensis show zigzag sculpture anterior and posterior to the umbones, but in adults only a little remains visible. The colour of the periostracum varies from green-brown to uniform dark brown while juveniles may be light brow
RMRHM4GR–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 3. Drawing of the shell-forming mantle edge of Binmphala- ria glabrata. showing the combined results after fixing the tissue with three different methods and staining with alcian blue. Zones 1-5 are facing the shell. A strongly positive reaction product appears in the mucus cells (MC) and the periostracum groove (PG) after staining with alcian blue at pH 2.5 (AB-F, hatched areas). A more lightly stained reaction product descends to the basis of the high prismatic cells of the belt and is detected apically in the cells
RMRMJBD0–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO THE KNOWLEDGE OF S.A. MARINE MOLLUSCA 383 In face of this uncertainty only recourse to Adams's Type (if still extant) can settle the question. If abyssicola is a high species, Adams's name will displace anceps Thiele; if it is subcircular, chuni Thiele will become a synonym. In the meantime Thiele's specific names are used here. All the species have a bristly periostracum which overlaps the margin of the shell, especially ventrally. Limopsis chuni Thiele Fig. 4 a Limopsis chuni Thiel
RMRPWRPN–. Allan Hancock Pacific expeditions. Scientific expeditions. 79 Fig. 79. Area mutabilis (Sowerby) 1833. Puerto Parker, Costa Rica. Shell with periostracum seen from the posterodorsal side. Length, 20 mm.. Fig. 80. Area mutabilis (Sowerby) 1833. Isia Isabel, Gulf of California, a. Lateral view. b. Dorsal view. c. Abdominal sense organs. Length, 30.8 mm.. 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.. Allan Hancock Foundatio
RMRH151E–. Bulletin. Natural history; Natuurlijke historie. 32 PEABODY MUSEUM BULLETIN 41. Fig. 17. Surface of the posterior periostracum in Spengleria rostrata; scanning electron micrograph. Rodlike structure on the right is a sponge spicule. Fig. 18. Abraded tips of aragonitic periostracal spikes on the sides of the shell in the anterior of Spengleria rostrata. Note the alignment of the spikes in rows oblique to the larger comarginal shell ridges. Fig. 19. Aragonitic periostracal spikes on the anteroventral shell margin oi Spengleria rostrata. Note the apical abrasion. Fig. 20. Acetate peel of a radi
RMRGH2K7–. Bulletin of the British Museum (Natural History) Zoology. . Fig. 32 Ledella jamesi: Growth series of shells from Station 239 in lateral outline to show change with increasing size. (Scale = 1 mm). and posterior parts with 7-11 strong chevron teeth, the number varying with size of shell; ligament amphidetic, inner part approximately rectangular in shape, external part ex- tending very short distance on either side of umbos; internally shell white and glossy, adductor scars and pallial line visible externally; periostracum cream with 'tortoise shell' pattern effect in some specimens. Larval sh
RMRG2X1X–. The Canadian field-naturalist. 48 The Canadian Field-Naturalist [Vol. XL. Figure II. Shell large, ovate to elongate-ovate, thin; periostracum pale yellowish horn; striae of growth very narrow and fine, crossed spirally by narrower and finer slightly elevated lines, producing irides- cent effects in reflected light; whorls six, rather flatly rounded, increasing rapidly in diameter, the last whorl very large; suture distinct but not deep; aperture usually elongate-ovate, rarely ovate; always longer than the spire; peristome thin or, in very old specimens, but slightly thickened, often expanded
RMRMKN4B–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Monographic Survey of South, African Non-marine Mollusca. 297 nearly uniform cream or pale buff, with a beautiful band of bright rose around the inner margin of aperture and up the columella, broadly diffused over the entire paries. I have, however, seen on one example traces of a thin dark brown periostracum, which probably covers the shell before weathering, resembling in this respect the more northerly races. The spire is broadly conoid, apical angle nearly 90°, apex very small, broadly subacute
RMRHMJ1N–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 2cm LIP B. RS U cm FIGURE 2. Lutcniula tntiicuhi, the ligament and lithodesma viewed from (A) the ventral and (B) from the anterior aspect. Abbreviations are: CL, Clavicle; CS, Crack in shell; FP, Fused periostracum ; L, Ligament; LI, Lithodesma; LIL, Lithodesmal ligament; LIP, Litho- desmal plate; RS, Resilifer; S, Shell. 1:1.31 ± 0.19:3.18 ± 0.56. These figures suggest that shell length is one of the most variable factors in the growth of the shell. The shell is thin. The largest specimen of L. truncata examined had dimens
RMRGDK30–. Bulletin of the Natural History Museum Zoology. Fig. 58 Yoldiella extensa. Lateral view of a shell from the right side and detail of the hinge-plate of a right valve. Specimens from Sta. 245 Argentine Basin. (Scale = 1.0 mm). Shell description (Figs. 58 & 59). Shell oblong-ovate, moderately robust, moderately inflated, nearly equilateral, very fine concentric lines, periostracum pale yellow; umbo inflated, raised slightly, directed posteriorly; dorsal margin slightly convex, antero-dorsal margin gradually slopes to broad rounded anterior margin, ventral margin long, curva- ture similar t
RMRGDK2C–. Bulletin of the Natural History Museum Zoology. Fig. 58 Yoldiella extensa. Lateral view of a shell from the right side and detail of the hinge-plate of a right valve. Specimens from Sta. 245 Argentine Basin. (Scale = 1.0 mm). Shell description (Figs. 58 & 59). Shell oblong-ovate, moderately robust, moderately inflated, nearly equilateral, very fine concentric lines, periostracum pale yellow; umbo inflated, raised slightly, directed posteriorly; dorsal margin slightly convex, antero-dorsal margin gradually slopes to broad rounded anterior margin, ventral margin long, curva- ture similar t
RMRGDKCG–. Bulletin of the Natural History Museum Zoology. Fig. 27 Yoldiella bilanta. Lateral view of the internal morphology from the right side of a specimen from Sta. 192 Cape Basin. (Scale 1.0 mm). For identification of parts see Fig. 5. Shell description (Fig. 28). Shell small, ovate, not inflated, inequilateral (posterior umbonal length 54-58% of total length), in larger specimens antero-ventrally, very fine concentric lines form broadly spaced ridges, periostracum pale yellow, umbo slightly raised, inwardly directed; dorsal margin slightly convex, antero-dorsal margin curves moder- ately steeply
RMRDPGA5–. The edible clams, mussels and scallops of California. Fig. 15. Siliqua. One-half natural ff. Shell strikingly elongated (length three or more times the breadth), with hinge margin and free .margin parallel or nearly so, gaping about equally at both ends; animal moving freely up and down a permanent burrow. Jackknife clams g. Umbo central: siphons separate, long. Tagelus califomianus p. 48 ; pi. 15 , fig. 1 gg. Umbo at extreme anterior end, siphons united. Solen h. Animal of moderate size; shell slightly curved, about 4 times as long as wide, with yellowish periostracum; foot with dark pigmen
RMRDPGJ2–. The edible clams, mussels and scallops of California. Mollusks; Shellfish. — 12 —. ii. Valves niai-ked with concentric ridges and sometinics ribs. j. No ladiating ribs, concentric ridges low, rounded, occasionally dividing into two, covered with a heavy, glossy, persistent periostracvnn ; pallial sinus reaching about half way to anterior miiscle sear; valve margin smooth; shell white. Sea cockle Ainiantes callosa p. 34 ; pi. 5 , fig. 3 jj. Radiating ribs picsent, concentric ridges not smoothly rounded n(jr dividing, with thin, grey, easily detached periostracum; pallial sinus small, not deep
RMRGDJYG–. Bulletin of the Natural History Museum Zoology. Fig. 4. Neilonella salicensis. A series of shells, from Atlantis II station 73 from the North Atlantic Basin, in lateral view from right side to show change in shape with increasing size. Scale = 1mm. Shell description (Figs 2-A) Shell robust, moderately elongate, moderately wide, ornamented with concentric ridges sometimes in groups of three to four well- defined ridges alternating with two to to three slighty less well-defined ridges slightly wider spaced than the former, light to dark straw-coloured periostracum; umbos moderately prominant,
RMRMN9K0–. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 81 On a new Modiola and a new Tellina. XII.—Descriptions of a new Modiola from Ceylon and of a new Tellina from JSw Caledonia. By H. B. PRESTON F.Z.S. Modiola taprobanensis, sp. n. Shell inflated, irregularly trapezoidal, somewhat curved, polished, shining,covered with a dark olive-green periostracum, which becomes paler posteriorly and is rather wrinkled towards the anterior ventral region ; both valves marked with irre- gular concentric growth-lines, angularly swollen anter
RMRDPGHN–. The edible clams, mussels and scallops of California. Mollusks; Shellfish. ii. Valves niai-ked with concentric ridges and sometinics ribs. j. No ladiating ribs, concentric ridges low, rounded, occasionally dividing into two, covered with a heavy, glossy, persistent periostracvnn ; pallial sinus reaching about half way to anterior miiscle sear; valve margin smooth; shell white. Sea cockle Ainiantes callosa p. 34 ; pi. 5 , fig. 3 jj. Radiating ribs picsent, concentric ridges not smoothly rounded n(jr dividing, with thin, grey, easily detached periostracum; pallial sinus small, not deeper than
RMRHMN1B–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 162 C. M. YONGE parallel plates forming local extensions of the general periostracum which is formed in this way. The spines are roughly triangular, almost half as wide as they are long. Both the number of rows of spines and the length of these increases with the size of the shell, e.g. from 10 rows of maximum length 1.6 mm. in a shell 2.5 cm. long to 14 rows of maximum length 2.5 mm. in one 3.2 cm. long. The shell grows by a series of obviously sudden bursts, as indicated by the con- spicuous presence of areas of almost pur
RMRDPGAD–. The edible clams, mussels and scallops of California. — 12 — ii. Valves marked with concentric ridges and sometimes ribs. j. No radiating ribs, concentric ridges low, rounded, occasionally dividing into two, covered with a heavy, glossy, persistent periostracum; pallial sinus reaching about half way to anterior muscle scar; valve margin smooth; shell white. Sea cockle Amiantes callosa p. 34 ; pi. 5 , fig. 3 jj. Radiating ribs present, concentric ridges not smoothly rounded nor dividing, with thin, grey, easily detached periostracum; pallial sinus small, not deeper than diameter of posterior
RMRGDKDP–. Bulletin of the Natural History Museum Zoology. Fig. 27 Yoldiella bilanta. Lateral view of the internal morphology from the right side of a specimen from Sta. 192 Cape Basin. (Scale 1.0 mm). For identification of parts see Fig. 5. Shell description (Fig. 28). Shell small, ovate, not inflated, inequilateral (posterior umbonal length 54-58% of total length), in larger specimens antero-ventrally, very fine concentric lines form broadly spaced ridges, periostracum pale yellow, umbo slightly raised, inwardly directed; dorsal margin slightly convex, antero-dorsal margin curves moder- ately steeply
RMRGDKD9–. Bulletin of the Natural History Museum Zoology. 26 J.A. ALLEN, H.L. SANDERS AND F. HANNAH. Fig. 27 Yoldiella bilanta. Lateral view of the internal morphology from the right side of a specimen from Sta. 192 Cape Basin. (Scale 1.0 mm). For identification of parts see Fig. 5. Shell description (Fig. 28). Shell small, ovate, not inflated, inequilateral (posterior umbonal length 54-58% of total length), in larger specimens antero-ventrally, very fine concentric lines form broadly spaced ridges, periostracum pale yellow, umbo slightly raised, inwardly directed; dorsal margin slightly convex, anter
RMRMKCHB–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF S.A. MARINE MOLLUSCA 61 Aperture ij— if times the spire. Protoconch ih whorls, alt. 1-5, diam. 2 mm., smooth but worn;. Postnatal whorls 4. Periostracum thick, forming close axial wrinkles, the free margins of which are minutely fimbriate. Operculum slightly convex. 23 x 12 mm. in 51 mm. shell. Fulvous or slightly pinkish or violaceous, periostracum dull brown, operculum, dark brown. Animal pale, sprinkled with black specks around margin of foot, siphon closely ringed wi
RMRGATCD–. Bulletin of the United States Fish Commission. Fisheries -- United States; Fish-culture -- United States. ---P5 112. P6T 113 114 Fig. hi.—Cross section of piece of shell. X s° approximately. Fig. 112.—Section through prismatic layer. X 45- Fig. 113.—Cross section through ligament. X 26. Fig. 114.—Cross section through edge of mantle. X 35. Fixed in Gilson fluid and stained with Delafield hematoxylin and congo red. Abbreviations.—GL, granularlayer; HyL, hyaline layer; IF, inner fold; 1L, inner layer containing a few groups of calcium crystals; MF, middle fold, showing origin of periostracum (
RMRDPGAA–. The edible clams, mussels and scallops of California. — 13 — ff. Shell oval or round in outline, conspicuously thin, growth lines usually faint, always more or less irregular, g. Shells without conspicuous periostracum, whitish. h. Ligament depressed so as not to he visible from the side ; siphonate end of shell not produced, valves deeply arched. Metis Metis alta p. 42 ; pi. 11 , fig. 2 hh. Ligament not depressed, hence visible from the side ; siphonate end of shell more or less produced, valves not deeply arched. Macoma i. Siphonate end of shell produced and bent to right; valves about equ
RMRGDKE9–. Bulletin of the Natural History Museum Zoology. 26 J.A. ALLEN, H.L. SANDERS AND F. HANNAH. Fig. 27 Yoldiella bilanta. Lateral view of the internal morphology from the right side of a specimen from Sta. 192 Cape Basin. (Scale 1.0 mm). For identification of parts see Fig. 5. Shell description (Fig. 28). Shell small, ovate, not inflated, inequilateral (posterior umbonal length 54-58% of total length), in larger specimens antero-ventrally, very fine concentric lines form broadly spaced ridges, periostracum pale yellow, umbo slightly raised, inwardly directed; dorsal margin slightly convex, anter
RMRDPGH1–. The edible clams, mussels and scallops of California. Mollusks; Shellfish. Fig. 13. Panope gcnerosa. E.xterior left valve. One-lTalf natviral size. Ligament external, f. Shell not markedly elongated (length not equalling three times the breadth) ; animal never moving freely up and down a permanent burrow, g. Shells not exceptionally thin nor gaping markedly at anterior end to accommodate foot, periostracum not conspicuous, no internal rib; not found in clear sand on open beaches.. Fig. 14. Zirfaea gahbi. One-half natural size. Exterior left valve. h. Valves gaping widely, particularly at sip
RMRDPGA7–. The edible clams, mussels and scallops of California. Fig. 13. Panope generosa. Exterior left valve. One-half natural size. Ligament external, f. Shell not markedly elongated (length not equalling three times the breadth) ; animal never moving freely up and down a permanent burrow, g. Shells not exceptionally thin nor gaping markedly at anterior end to accommodate foot, periostracum not conspicuous, no internal rib-, not found in clear sand on open beaches.. Fig. 14. Zirfaea gabbi. size. Exterior left valve. One-half natural h. Valves gaping widely, particularly at siphonate end; pallial sin
RMRHM57X–. The Biological bulletin. Biology; Zoology; Marine biology. 372 T. H. SWIXKHAKT AND K. V. SMITH. Figure 2. Scanning displays of Fe, Mn, Mg and Ca for a section of the shell of a speci- men of U. novahollandae and a diagram of the limits of the periostracum and CaCOa-containing region. with distilled water after collection and put in an aquarium containing fresh water, where they remained for several davs. Typical analyses for various metals were: (Fe) 0.6%, 1.3; (Mn) 2.6, 1.1; (Mg) 0.15, 0.11,'and (Fe) 2.7; (Mn) 0.48, 0.37, 0.77. The percentages recorded for the two analyses are from differe
![. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. ^3k. Fig. 3. a, b. Glycimeris connollyi Tomlin, with detail of ribbing further enlarged. c.G. connollyi var. from Sedgefield. d. outline of G. queketti Sow. superimposed on outline (dotted) of Newton's figure of ]pilosa. Teeth at 4 mm. shell length 9-10, at 7 mm. 14, at 15 mm. 18, increasing to 22-24, with a few feeble and indistinct ones in the middle. Margin internally crenulate. Periostracum thin, shortly fibrous, usually abraded except on lateral parts of shell. Up to length 65, alt. 65 mm. (Sowe Stock Photo](https://c8.alamy.com/comp/RMJBEM/annals-of-the-south-african-museum-=-annale-van-die-suid-afrikaanse-museum-natural-history-3k-fig-3-a-b-glycimeris-connollyi-tomlin-with-detail-of-ribbing-further-enlarged-cg-connollyi-var-from-sedgefield-d-outline-of-g-queketti-sow-superimposed-on-outline-dotted-of-newtons-figure-of-pilosa-teeth-at-4-mm-shell-length-9-10-at-7-mm-14-at-15-mm-18-increasing-to-22-24-with-a-few-feeble-and-indistinct-ones-in-the-middle-margin-internally-crenulate-periostracum-thin-shortly-fibrous-usually-abraded-except-on-lateral-parts-of-shell-up-to-length-65-alt-65-mm-sowe-RMJBEM.jpg ". Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. ^3k. Fig. 3. a, b. Glycimeris connollyi Tomlin, with detail of ribbing further enlarged. c.G. connollyi var. from Sedgefield. d. outline of G. queketti Sow. superimposed on outline (dotted) of Newton's figure of ]pilosa. Teeth at 4 mm. shell length 9-10, at 7 mm. 14, at 15 mm. 18, increasing to 22-24, with a few feeble and indistinct ones in the middle. Margin internally crenulate. Periostracum thin, shortly fibrous, usually abraded except on lateral parts of shell. Up to length 65, alt. 65 mm. (Sowe Stock Photo")
RMRMJBEM–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. ^3k. Fig. 3. a, b. Glycimeris connollyi Tomlin, with detail of ribbing further enlarged. c.G. connollyi var. from Sedgefield. d. outline of G. queketti Sow. superimposed on outline (dotted) of Newton's figure of ]pilosa. Teeth at 4 mm. shell length 9-10, at 7 mm. 14, at 15 mm. 18, increasing to 22-24, with a few feeble and indistinct ones in the middle. Margin internally crenulate. Periostracum thin, shortly fibrous, usually abraded except on lateral parts of shell. Up to length 65, alt. 65 mm. (Sowe
RMRMJ8HD–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. CONTRIBUTIONS TO KNOWLEDGE OF S.A. MARINE MOLLUSGA 75 a little stronger and more widely spaced on later whorls. Parietal callus present; columella with 3 pleats, but posterior one feeble and obscure in large specimens. Canal long, narrow, sigmoid; outer lip thin, not plicate internally. Periostracum thin. 132 X 51 mm. Operculum 35 X 19 mm. in 132 mm. shell. White with pale yellowish brown periostracum, operculum dark brown. Radula with 230-250 rows, usually an accessory denticle externally on both si
RMRGDK42–. Bulletin of the Natural History Museum Zoology. ig. 55 Yoldiella robusta. Lateral view of a shell from the right side and detail of hinge-plate of a left valve. Specimens from Sta. 280 Argentine Basin. (Scale = 1.0 mm). ARGENTINE BASIN Atlantis II 280 256- 3495 36°18.0'S 293 53°23.9'W ES 29.3.71 Restricted to one Station at the shelf/slope break of the Argentine Basin. Depth range: 256-293 m. Shell description (Figs. 55 & 56). Shell subovate, moder- ately inflated, irregular concentric growth lines and small ridges best developed posteriorly, periostracum pale yellow; umbos anterior to m
RMRHM4H3–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 238 J. C . MARXEN ET At. Table IV The bimlin^ pattern of lectins to the periostracum groove PG). the bell, and the outer mantle epithelium (OME) o/Biomphalaiia glabrata, the extracted water-sohible organic matrix fraction ISM), the 19.6-kDa protein, i nd the acid lEF 1 umds oj the B. glabrata shell Lectin Specificity PG Belt OME Whole SM 19.6 kDa protein A cidic lEF bands UEA-1 Fuc t+; ( + ) - - n.t. n.t. DBA GalNac - ( + ) - - n.t. n.t. SBA GalNac ++ + + + - (+) n.t. MPA Gal, GalNac - + + - + + + â ++ + PNA Gal + + - (+) -
RMRMKHJ2–. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. o m M Fig. 35. Marine shell ornaments: 'pendants' with plain edges. A, D-E, J-L. Layer 5. B, G-H. Layer 6. C, I. Layer 4. F. Layer 7. M, O. Layer 1. N. Layer 2. P. Layer 8. All but three of the pendants are made of Turbo sarmaticus. They consist mostly of the nacreous inner shell, the periostracum having fallen away or been removed, and in every case the perforations have been drilled from the inner surface of the shell. The three not made of Turbo sarmaticus are two of Haliotis midae from layers 1 a
RMRGDK5F–. Bulletin of the Natural History Museum Zoology. 10 A.V. SYSOEV. Figs 42-48 Comitaspaupera (Watson, 1881). 41 - lectotype, H = 40.0 mm; 43,44 - paralectotypes, H = 33.3 (43) and 18.5 (44) mm, BM(NH) 1887.2.9.1009-ll;45,46-stn62,H = 23.4(45)and 17.5 (46) mm; 47,48-stn 185, H = 14.0 (47) and 14.9(48) mm. Comitas cwviplicata Sysoev, new species Fig. 29 Material, stn 184, 2 specimens (holotype No. 1993092 and paratypeNo. 1993093). Description of holotype. The shell medium size, fusiform, rather thin, covered with light-brown periostracum, consists of 7 whorls. The protoconch is missing. The whorl
RMRGDK3W–. Bulletin of the Natural History Museum Zoology. 10 A.V. SYSOEV. Figs 42-48 Comitaspaupera (Watson, 1881). 41 - lectotype, H = 40.0 mm; 43,44 - paralectotypes, H = 33.3 (43) and 18.5 (44) mm, BM(NH) 1887.2.9.1009-11; 45,46-stn 62, H = 23.4(45) and 17.5 (46) mm; 47,48-stn 185, H = 14.0 (47) and 14.9 (48)mm. Comitas curviplicata Sysoev, new species Fig. 29 Material, stn 184, 2 specimens (holotype No. 1993092 and paratype No. 1993093). Description of holotype. The shell medium size, fusiform, rather thin, covered with light-brown periostracum, consists of 7 whorls. The protoconch is missing. The
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