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Sponge spicule Stock Photos and Images
RMKMGBPW–Freshwater sponge, photomicrograph, Ephydatia fluviatilis Megascleres, Gillsyke Coniston, UK
RFFDBAJG–Sand microfossils. Coloured scanning electron micrograph (SEM) of microfossils from maldives beach sand. Microfossils are roughly 0.05 to 2mm in size. These are the remains of complete organisms, the common ones are foraminifera, ostracods and sponge spicules. Magnification: x 40 when printed at 10 centimetres wide.
RM2HM8AMC–The Glass sponge extracts silicic acid from seawater and spins a delicate lattice of siliceous spicule fibres to construct a delicate support frame.
RM2WEDD0Y–Section of a calcareous sponge; Various forms of sponge-spicules; and Canal system of Sycon gelatinosum. From Sea Beach at Ebb Tide, Augusta Foote Arnold, 1901.
RM2HM8AW4–The Glass Sponge extracts silicic acid from seawater and spins a delicate lattice of siliceous spicule fibres to construct a delicate support frame.
RM2AKPK7J–Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . Fig. 111. Aslromma Aristoteli. resemblances, in which there is no apparent reasonwhy such should exist. A familiar example is foundin the branchiae of the JEolis, which are somewhatlike an oak-leaf, and also the resemblance whichsome of the foraminiferse bear to the nautilus, sogreat as to induce our older naturalists to classthem with the mollusca. The annexed illustrationsgive instances of curious analogies. In fig. 213 wehave a sponge spicule bearing a close resemblanceto one of
RMGK6A56–52520 Sponges - to illustrate choanocyles (Ch)- section o, a, calcareous sponge Ect ectoderm; Mes mesoderm; N, calcerous spicule; Eis
RF2H186YJ–Sea world icon isometric vector. Sponge coral porifera and scallop sea shell. Hard mushroom coral, marine symbol
RFFDBAJX–Sand microfossils. Coloured scanning electron micrograph (SEM) of microfossils from maldives beach sand. Microfossils are roughly 0.05 to 2mm in size. These are the remains of complete organisms, the common ones are foraminifera, ostracods and sponge spicules. Magnification: x 40 when printed at 10 centimetres wide.
RM2HM8AM3–The Glass Sponge extracts silicic acid from seawater and spins a delicate lattice of siliceous spicule fibres to construct a delicate support frame.
RM2AKPKM2–Hardwicke's science-gossip : an illustrated medium of interchange and gossip for students and lovers of nature . © >fj£|? Fig-. 243. Sponge spicule. popular names of walking-sticks, walking-straws, leaf-insects, &c, &c. These, and othercases of analogy of form which might be cited, areno doubt designed by a beneficent Providence with. Fig. 111. Aslromma Aristoteli. resemblances, in which there is no apparent reasonwhy such should exist. A familiar example is foundin the branchiae of the JEolis, which are somewhatlike an oak-leaf, and also the resemblance whichsome of the foraminiferse bear
RMPFYT39–. Fresh-water biology. Freshwater biology. 22 (21) Rays and spines of birotulates entire 23 23(24) Margins of rotules very finely serrate. Ephydaiia millsii (Potts) 1SS7. Sponge encrusting. Gemmules small. Skeleton spicules nearly straight, slender, rather abruptly pointed, entirely microspined. Gemmule birotulates very numerous, very symmetrical, their shafts usually smooth. Rotules sometimes microspined. From Sherwood Lake, near Deland, Florida. Fig. 568. Spicules of Ephydaiia millsii. Three types of spicules figured here: microspined skeleton spicule; mature gemmule birotulates with smooth
RF2H17C1R–Sea world icon isometric vector. Sponge coral porifera and scallop sea shell. Hard mushroom coral, marine symbol
RM2AWPAA2–The microscope and its revelations . Microscopic Organisms in Levant Mud:—a, d, siliceous spiculesoiTethi/a; B, H, spicules of Geodia; c, Sponge-spicule (unknown); e,calcareous spicule of Ghantia; f, g, m, o, portions of calcareous skele-ton of Ecliinodermata; H, I, calcareous spicule of Gorgonia; k, l, n,siliceous spicules of Halichondria ; p, portion of prismatic layer ofshell of Pinna. COMPOSITION OF MARINE DEPOSITS. 745 tinually undergoing a slow but steady increase in thickness,tlie microscopic researches of Prof. Williamson* have shownthat not only are there multitudes of minute remains
RMPFYT5D–. Fresh-water biology. Freshwater biology. Sponge evergreen, encrusting, thin, sending out numerous long, slender waving branches from a relatively thick basal membrane. Gemmules few, in scattered branches. Skeleton spicules smooth, straight or slightly curved, rather abruptly pointed. Dermal spic- ules minute, smooth, straight or curved, slender, gradually pointed. From clear standing water in New Jersey and Virginia. Fig. s6o. Spicules of Spongilla aspinosa. Four types of spicules figxured here; ordinary skeleton spicules abruptly pointed at both ends; skeleton spicule, acute or rounded at o
RMRHN5NA–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SPONGE SPICULE AXIAL FILAMENT 693. 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
RMRH3T9E–. British Antarctic expedition, 1907-9, under the command of E.H. Shackleton : reports on the scientific investigations ; geology. Scientific expeditions; Natural history; Geology; Paleontology; Petrology; Ice. 28 diams.. Fig. 1 Erratic, tape Royds. Etched with Hydrofluoric acid. Dolomitised and silicified oolitic limestone with banded agate structure in matrix. Fig. 2 Stranded Moraine, East Fork. Fenar Glacier. Dense limestone with volcanic fragments, quartz, and fresh sponge spicule. m c No. HIT. 28 diams. Please note that these images are extracted from scanned page images that may have bee
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
RMRGJCNC–. Bulletin of the British Museum (Natural History), Geology. ^ Al Fe Fe Si 3. GLAUCONITIC SPICULE x 4750 i ^ â â1 ^. l/5 < ^ u 5 .-;! Fig. 48 Geochemical data of specimens from the Upper Greensand. 1. Glauconitic cast of a foraminifer. 2. Grain of glauconite from the sediment. 3. Sponge spicule replaced by glauconite. 4. Ostracod specimen from the cherts. 108. 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.. British Muse
RMRH3T92–. British Antarctic expedition, 1907-9, under the command of E.H. Shackleton : reports on the scientific investigations ; geology. Scientific expeditions; Natural history; Geology; Paleontology; Petrology; Ice. Fig. 1 Erratic, tape Royds. Etched with Hydrofluoric acid. Dolomitised and silicified oolitic limestone with banded agate structure in matrix. Fig. 2 Stranded Moraine, East Fork. Fenar Glacier. Dense limestone with volcanic fragments, quartz, and fresh sponge spicule. m c No. HIT. 28 diams. Nil 111? 90 diams. Fig. :! Farthest South. December 20, 1908. In siln Stained with Lemberg's solu
![. Bulletins of American paleontology. Hydrology, Vegetation, and Climate: Winkler et al. 89 A06 A23 Sponge spicule pieces per g dry wt Sponge spicule pieces per g dry wt a V Q 0-7- 1 1 1 1 1 1 7-14- h1>+â 14-20- ^]IZi:::=«>-i 20-25 - >-(â 25-32 - 32-39 - 39-45 - JII^;&o-i 45-50- ^0<^^ 50-57- 57-60.5- I960 *l- 30 YBP 60.5-64 - 64-70-( 70-75 -< 2100 -^/- 30 YBP a. o. 1380 +/- 70 YBP 1660 -fZ-lOO YBP 1890 +/- 70 YBP 2600 *l- 70 YBP 2840 +/- 70 ^ BP 2830 â ^/- 60 YBP 2840 +/- 70 YBP a. b. Text-Hgure 17.- sample. -Sponge spicule pieces per gram dry weight for A06 and A23. Erro Stock Photo](https://c8.alamy.com/comp/RGA7PJ/bulletins-of-american-paleontology-hydrology-vegetation-and-climate-winkler-et-al-89-a06-a23-sponge-spicule-pieces-per-g-dry-wt-sponge-spicule-pieces-per-g-dry-wt-a-v-q-0-7-1-1-1-1-1-1-7-14-h1gt-14-20-izi=gt-i-20-25-gt-25-32-32-39-39-45-jiiampo-i-45-50-0lt-50-57-57-605-i960-l-30-ybp-605-64-64-70-70-75-lt-2100-30-ybp-a-o-1380-70-ybp-1660-fz-loo-ybp-1890-70-ybp-2600-l-70-ybp-2840-70-bp-2830-60-ybp-2840-70-ybp-a-b-text-hgure-17-sample-sponge-spicule-pieces-per-gram-dry-weight-for-a06-and-a23-erro-RGA7PJ.jpg ". Bulletins of American paleontology. Hydrology, Vegetation, and Climate: Winkler et al. 89 A06 A23 Sponge spicule pieces per g dry wt Sponge spicule pieces per g dry wt a V Q 0-7- 1 1 1 1 1 1 7-14- h1>+â 14-20- ^]IZi:::=«>-i 20-25 - >-(â 25-32 - 32-39 - 39-45 - JII^;&o-i 45-50- ^0<^^ 50-57- 57-60.5- I960 *l- 30 YBP 60.5-64 - 64-70-( 70-75 -< 2100 -^/- 30 YBP a. o. 1380 +/- 70 YBP 1660 -fZ-lOO YBP 1890 +/- 70 YBP 2600 *l- 70 YBP 2840 +/- 70 ^ BP 2830 â ^/- 60 YBP 2840 +/- 70 YBP a. b. Text-Hgure 17.- sample. -Sponge spicule pieces per gram dry weight for A06 and A23. Erro Stock Photo")
RMRGA7PJ–. Bulletins of American paleontology. Hydrology, Vegetation, and Climate: Winkler et al. 89 A06 A23 Sponge spicule pieces per g dry wt Sponge spicule pieces per g dry wt a V Q 0-7- 1 1 1 1 1 1 7-14- h1>+â 14-20- ^]IZi:::=«>-i 20-25 - >-(â 25-32 - 32-39 - 39-45 - JII^;&o-i 45-50- ^0<^^ 50-57- 57-60.5- I960 *l- 30 YBP 60.5-64 - 64-70-( 70-75 -< 2100 -^/- 30 YBP a. o. 1380 +/- 70 YBP 1660 -fZ-lOO YBP 1890 +/- 70 YBP 2600 *l- 70 YBP 2840 +/- 70 ^ BP 2830 â ^/- 60 YBP 2840 +/- 70 YBP a. b. Text-Hgure 17.- sample. -Sponge spicule pieces per gram dry weight for A06 and A23. Erro
RM2ANGEG6–Beginners' zoology . 20 BEGINNERS ZOOLOGY. spongin, a durable substance of the same chemical nature as silk(Figs. 30 and 31). The limy sponges have skeletons made of numerous spicules oflime. The three-rayed spicule is the commonest form. The commercial sponge, seen as it grows in the ocean, appearsas a roundish mass with a smooth, dark exterior, and having aboutthe consistency of beef liver. Several large openings (oscula),from which the water flows, are visible on the upper surface.Smaller holes (inhalent pores — many of them so small as to beindistinguishable) are on the sides. If the spong
RM2AN8RGC–Quarterly journal of microscopical science . the mass. The object is drawn as seen when focussed downnearly to the equatorial margin, hence many of the stellate spi-cules are not seen. „ 3. Furcated attenuato-patento-ternate spicule of Bowerbank (50). „ 4. Stellate spicules of the bark layer. „ 5. Recurvo-teruate spicule, Bwk. (54). „ 6. Expando-ternate spicule, Bwk, (128). PLATE III. Hyalonema mirabilis. Gray. Osuluni from the interior of the Sponge mass, near the place where the glass coil ends. Upper figure enlarged; lower figure showingthree spiculate cruciform spicules, the cruciform port
RM2CDCCT7–. The Tanganyika problem; an account of the researches undertaken concerning the existence of marine animals in Central Africa . Fig. 2.—rt., The skeleton of Spoiti^illa iiioorci ncAr the surface in section X 200. />., Aportion of two fibres X 800. r., The skeleton as seen in section from the base to theupper surface. 314 THE TANGANYIKA PROBLEM. The spicular systems of the third class are seldom found in any other position thanin the fibres. As a rule, the spicules are arranged in the fibres with their axes parallel to (meanother, and in the deeper parts of the sponge the connecting spicule
RM2CE54R5–. Beginners' Zoology . Fig. 30.—A hornysponge.. sp07igin, a durable substance of the same chemical nature as silk,(Figs. 30 and 31). The limy sponges have skeletons made of numerous spicules oflime. The three-rayed spicule is the commonest form. The commercial sponge, seen as it grows in the ocean, appearsas a roundish mass with a smooth, dark exterior, and having aboutthe consistency of beef liver. Several large openings (oscula),from which the water flows, are visible on the upper surface.Smaller holes (inhalent pores — many of them so small as to beindistinguishable) are on the sides. If th
RM2CEMFAK–. The Annals and magazine of natural history; zoology, botany, and geology. oup themselves at points about one fourth the length of the sjiicule from one or both of its extremities. Measurements : Diameter of gemmules 0-036 inch, skeleton-spicules 0*0068 by 0-0002 inch ; length of average dermal spicule 0-00066 inch, of gemmula spicule 0-00145 inch. Habitat. Incrusting stones in shallow water.Locality. Lakes or ponds in the vicinity of Hearts Content, New-foundland, collected by Mr. A. H. MacKay. All the specimens of this sponge came from the neighbourhood ofHearts Content, but whether they we
RM2CEH46N–. The Quarterly journal of the Geological Society of London. 7.*60 ■ . ; 1 --,-;• fc£p & - a^ - M-t % * I 1 ml. -.,■■ fi 13 ^ o 1 i l : -J &S? *...: PH&RETROSPMJGTA. STRAHANI. ) , 10. , | o Miniern Bros imp W. J. SOLLAS ON PHARETROSPONGIA STRAHANI. 255 Fig. 9. Individual spicules of fig. 8 (X 435). 10. Transverse sections of spicules ( X435). 11. Spicule from a recent Australian sponge, for comparison with fig. 9 (X435). 12. Section of fibre of Australian sponge ( X140). 13. Fragments of spicules containing small spherules of an unknown nature ( X140). 14. Isolated spherule from the infillin
RMRMP93X–. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Species of Echinonematous Sponge. 21 its varieties result from the tendency to continued variation displayed by an organ or organism in which a variation has once been initiated. (2) The overwhelming preponderance of the bifid spicule of figs. 2 & 21 is an instance of the survival of the fittest; this form has been selected from the great diversity of related forms because it best satisfied the requirements of the sponge. (3) The biaxial and uniaxial biradiate varieties, w
RMRMR5PJ–. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Species of Echinonematous Sponge. 51 that the forms so revealed were always similar to that of the spicule from which they were derived, a conical acuate always remaining a conical acuate, and a stunted cylindrical one always remaining stunted and cylindrical; and thus Bower- bank's notion that the latter are young forms of the former, and would become pointed and conical with growth, is refuted; the cylindric are aborted, not immature forms of the acuates. The statement that
RMRMP94M–. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. 18 Mr. W. J. Sollas on a new Genus and very numerous, frequently collected into longitudinal bundles (fig. 5). Hah. Marine. Loc. (?). Collection, Bristol Museum. Obs. Two of the most important characters of this sponge are, first, the triradiate form of its echinating spicules, and, next, the extreme tendency to variation which these display. That the normal echinating spicule is truly triradiate, just as, say, a characteristic Hexactinellid spicule is sexradiate, is proved by
RMRDKH2M–. The Cambridge natural history. Zoology. CALCAREA HETEROCOELA 189 may be called its Ascon stage, by a process of outgrowth of tubes from its walls, followed by restriction of choanocytes to the flagellated chambers. Minute observation has shown ^ that this latter event is brought about by immigration of pinacocytes from the exterior. These cells creep through the jelly of the dermal. Fio. Sl.—S. setosum. Young Sponge, with one whorl of radial tubes. 0, Osculum ; p, pore ; sj>y monaxon ; s}}^, quadriradiate spicule. (After Maas.) layer and line the paragaster as fast as its original coverin
RMRHYNKY–. Beginners zoology. Zoology. spongin, a durable substance of the same chemical nature as silk (Figs. 30 and 31). The limy sponges have skeletons made of numerous spicules of lime. The three-rayed spicule is the commonest form. The commercial sponge, seen as it grows in the ocean, appears as a roundish mass with a smooth, dark exterior, and having about the consistency of beef liver. Several large openings (oscula), from which the water flows, are visible on the upper surface. Smaller holes (inhalent pores — many of them so small as to be indistinguishable) are on the sides. If the sponge is d
![. The Canadian record of science. Natural history. Neiu Fresh-Water Sponges 21 " Heteromeyenia pictovensis, n. sp.—Sponge light green, even when dry, massive, encrusting ; texture very compact; spicules non-fasciculated, persistent; surface mostly smooth. —G-emmules very scarce, spherical crust thick.—Skeleton spicules cylindrical, short, robust, rounded, or abruptly terminated ; entirely spined, spines conical at the centre of the spicule, elsewhere generally curving/onward, or towards each extremity. Rounded terminations of spicules covered with short spines, though frequently a single Stock Photo](https://c8.alamy.com/comp/RFX87E/the-canadian-record-of-science-natural-history-neiu-fresh-water-sponges-21-quot-heteromeyenia-pictovensis-n-spsponge-light-green-even-when-dry-massive-encrusting-texture-very-compact-spicules-non-fasciculated-persistent-surface-mostly-smooth-g-emmules-very-scarce-spherical-crust-thickskeleton-spicules-cylindrical-short-robust-rounded-or-abruptly-terminated-entirely-spined-spines-conical-at-the-centre-of-the-spicule-elsewhere-generally-curvingonward-or-towards-each-extremity-rounded-terminations-of-spicules-covered-with-short-spines-though-frequently-a-single-RFX87E.jpg ". The Canadian record of science. Natural history. Neiu Fresh-Water Sponges 21 " Heteromeyenia pictovensis, n. sp.—Sponge light green, even when dry, massive, encrusting ; texture very compact; spicules non-fasciculated, persistent; surface mostly smooth. —G-emmules very scarce, spherical crust thick.—Skeleton spicules cylindrical, short, robust, rounded, or abruptly terminated ; entirely spined, spines conical at the centre of the spicule, elsewhere generally curving/onward, or towards each extremity. Rounded terminations of spicules covered with short spines, though frequently a single Stock Photo")
RMRFX87E–. The Canadian record of science. Natural history. Neiu Fresh-Water Sponges 21 " Heteromeyenia pictovensis, n. sp.—Sponge light green, even when dry, massive, encrusting ; texture very compact; spicules non-fasciculated, persistent; surface mostly smooth. —G-emmules very scarce, spherical crust thick.—Skeleton spicules cylindrical, short, robust, rounded, or abruptly terminated ; entirely spined, spines conical at the centre of the spicule, elsewhere generally curving/onward, or towards each extremity. Rounded terminations of spicules covered with short spines, though frequently a single
RMRGH8BF–. Bulletin of the British Museum (Natural History). Zoology . Supplement.. CARDIGAN BAY RECENT FORAMINIFERA Depository. B.M.(N.H.) Slide 1970 : 11 : 26 : 10. Stub 1970 : 11 : 26 : 686. Provenance. Specimen described, CB 311. Remarks. This species is distinguished from P. fusca by its finer wall and by the presence of one or more sponge spicules. Heron-Allen & Earland (1913a) supposed it 'constructs its abode round the spicule in order to obtain the increased support afforded by its projections in supporting itself upon the surface layers of the bottom ooze'. Distribution. This species was
RMRD89K1–. Fresh-water biology. Freshwater biology. 22 (21) Rays and spines of birotulates entire 23 23(24) Margins of rotules very finely serrate. Ephydaiia millsii (Potts) 1SS7. Sponge encrusting. Gemmules small. Skeleton spicules nearly straight, slender, rather abruptly pointed, entirely microspined. Gemmule birotulates very numerous, very symmetrical, their shafts usually smooth. Rotules sometimes microspined. From Sherwood Lake, near Deland, Florida. Fig. 568. Spicules of Ephydaiia millsii. Three types of spicules figured here: microspined skeleton spicule; mature gemmule birotulates with smooth
RMRFPN5T–. Cassell's natural history. Animals; Animal behavior. SPONGE SPICULES. 321 tlie rest by excess or defect of developiiieut, as tlie sluift ((/ to /), ilie other three remaining siniihu- to erxh other being known as the rays or arms. The shaft usually takes a radiate direction in the Sponge, at right angles to the surface, with which the rays, on the contrary, lie more or less parallel; the point of the shaft is directed inwards towards the centre of the Sponge, the head or rayed end out- wards. The rays may grow backwards, recurved, giving the spicule a grapnel-like form (y), or forwards, fork
RMRH1RG7–. Bulletin. Natural history; Natuurlijke historie. 30 A SYSTEMATIC STUDY OF THE DEMOSPONGIAE OF JAMAICA Indies. P. carbonaria (Lamarck) as described by de Laubenfels from Dry Tortugas is a black sponge with larger oxeas and a network of subdermal canals. The white P. coela de Laubenfels (1950a) of Bermuda differs from the Jamaican sponges by its smaller spicules and less robust spicule tracts. The type species of Pellina, P. seinitubulosa, de- scribed from the Mediterranean, is also white in color. The Adriatic specimens studied by Babic (1922) and Keller (1878) do have spicules similar in siz
RMRHKN7Y–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. Figure 23. Spicules surrounded by spongin fibers and by discontinuous cytoplasm in the juvenile sponge of Li'iicoxolenia luxti about 72 h after settlement. S: space occupied by a triradiate spicule. Scale bar = I /iin. Figure 24. A vacuolar cell in the mesohyl of the juvenile sponge of Leucosolenia laxa about 72 h after settlement. Scale bar = 2 jum. types may have similar functions, but the bottle cells cannot be named cruciform cells because the former cells are not arranged in each quadrant in a horizontal plane. Vesicula
RMRD89T9–. Fresh-water biology. Freshwater biology. Sponge evergreen, encrusting, thin, sending out numerous long, slender waving branches from a relatively thick basal membrane. Gemmules few, in scattered branches. Skeleton spicules smooth, straight or slightly curved, rather abruptly pointed. Dermal spic- ules minute, smooth, straight or curved, slender, gradually pointed. From clear standing water in New Jersey and Virginia. Fig. s6o. Spicules of Spongilla aspinosa. Four types of spicules figxured here; ordinary skeleton spicules abruptly pointed at both ends; skeleton spicule, acute or rounded at o
RMRN5NNR–. Animal biology; Human biology. Parts II & III of First course in biology. Biology. spoil gin, a durable substance of the same chemical nature as silk (Figs. 30 and 31). The limy sponges have skeletons made of numerous spicules of lime. The three-rayed spicule is the commonest form. The commercial sponge, seen as it grows in the ocean, appears as a roundish mass with a smooth, dark exterior, and having about the consistency of beef liver. Several large openings (oscula), from which the water flows, are visible on the upper surface. Smaller holes (inhalent pores--many of them so small as t
![. The Cambridge natural history. Zoology. 204 PORTFERA. Fig. 97.—Ilyalone-mco thomscni. A, Whole specimen with rooting tuft and J^izoanthus crust; B, pinulus, a spicule characteristic of but not peculiar to the Amphiiliscophora, occurring in the dermal and gastral membranes; C, amphidisc with axial cross ; D, distal end of root- ing spicule with grapnel. (After F. E. Schulze.) inserted in a sponge " ; next Ova have rarely been found, and se.ually produced larvae never; but Ijima has found archaeocyte clusters in abundance, and his evidence is in favour of the view that they give rise ase Stock Photo](https://c8.alamy.com/comp/RDKGX1/the-cambridge-natural-history-zoology-204-portfera-fig-97ilyalone-mco-thomscni-a-whole-specimen-with-rooting-tuft-and-jizoanthus-crust-b-pinulus-a-spicule-characteristic-of-but-not-peculiar-to-the-amphiiliscophora-occurring-in-the-dermal-and-gastral-membranes-c-amphidisc-with-axial-cross-d-distal-end-of-root-ing-spicule-with-grapnel-after-f-e-schulze-inserted-in-a-sponge-quot-next-ova-have-rarely-been-found-and-seually-produced-larvae-never-but-ijima-has-found-archaeocyte-clusters-in-abundance-and-his-evidence-is-in-favour-of-the-view-that-they-give-rise-ase-RDKGX1.jpg ". The Cambridge natural history. Zoology. 204 PORTFERA. Fig. 97.—Ilyalone-mco thomscni. A, Whole specimen with rooting tuft and J^izoanthus crust; B, pinulus, a spicule characteristic of but not peculiar to the Amphiiliscophora, occurring in the dermal and gastral membranes; C, amphidisc with axial cross ; D, distal end of root- ing spicule with grapnel. (After F. E. Schulze.) inserted in a sponge " ; next Ova have rarely been found, and se.ually produced larvae never; but Ijima has found archaeocyte clusters in abundance, and his evidence is in favour of the view that they give rise ase Stock Photo")
RMRDKGX1–. The Cambridge natural history. Zoology. 204 PORTFERA. Fig. 97.—Ilyalone-mco thomscni. A, Whole specimen with rooting tuft and J^izoanthus crust; B, pinulus, a spicule characteristic of but not peculiar to the Amphiiliscophora, occurring in the dermal and gastral membranes; C, amphidisc with axial cross ; D, distal end of root- ing spicule with grapnel. (After F. E. Schulze.) inserted in a sponge " ; next Ova have rarely been found, and se.ually produced larvae never; but Ijima has found archaeocyte clusters in abundance, and his evidence is in favour of the view that they give rise ase
RMRHKMAG–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTION OF LATRUNCULIID SPONGE 311. Figure 5. Latrunculia magnified typical discorhabd microscleres. (a) A spicule embedded in spongin. Scale bar = 10 ^m (SEM). (b) A layer of discorhabds near the sponge's surface. Scale bar-20 >im (SEM). ing many months of the year serves to confirm this con- clusion. An extended reproductive season has been found among other brooding sponges in the Red Sea (Ilan and Loya, 1988, 1990; Ilan and Vacelet, 1993). This strategy could be a means of ensuring settlement on vacant spots as t
RMRH1PCF–. Bulletin. Natural history; Natuurlijke historie. STRUCTURE AND FUNCTION OF SPONGE CELLS n 0 37. Text-fig. L Spicule types present in Microciona atrasanguinea. A. Thick (= coring) styles. B. Thin styles. C. Toxas. D. Acanthostyles. E. Spination on the heads of thick styles (above) and thin styles (below). F. Palmate isochelas. Nucleolate cells, epidermal cells, and choanocytes contain RNA. This oc- curs in the cytoplasm of these cells and in the nucleoli of nucleolate cells (see Table 9). Microciona seriata (Grant, 1826, p. 116) new combination (see p. 93 for generic placement of this species
RMRHKNDT–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 26 S. AMANO AND I. HORI 11 12. Figure 11. A live metamorphosing larva of Leucosolenia luu about 18 h after settlement. Scale bar = 50 /xm. Figure 12. Section of the metamorphosing larva of Leucusulcnui IUMI about 18 h after settlement. I: inner cell mass. P: pinacoderm. Scale bar = 50 /xm. Figure 13. A live juvenile sponge of Leucnsolenia laxa about 12 h alter settlement. The basal end of this sponge spreads and attaches to the substratum. T: triradiate spicule. Scale bar = 50 /xm. not yet very thin. The cells of an inner c
![. The Cambridge natural history. Zoology. Fio. 82.—Sycon raphanus. A, Longitudinal section of young decalcified Sponge at a stage somewhat later than that shown in Fig. 81. B, Transverse section of the same through a whorl of tubes, d. Dermal memhratte; <?, gastral membrane; H, paragaster ; 5^"*, tetraradiate spicule ; T, radial tube. (After Maas.) d.o d.o. Fig. 83.—Transverse section of the body-wall of Ute.^ passing longi- tudinally through two chambers. a.p, Apopyle ; cl.o, dermal ostium ; fi.ch, flagellated chamber or radial tube ; i.c, inhalant canal; p, pro- sopyle. (After Bendy. Stock Photo](https://c8.alamy.com/comp/RDKH2C/the-cambridge-natural-history-zoology-fio-82sycon-raphanus-a-longitudinal-section-of-young-decalcified-sponge-at-a-stage-somewhat-later-than-that-shown-in-fig-81-b-transverse-section-of-the-same-through-a-whorl-of-tubes-d-dermal-memhratte-lt-gastral-membrane-h-paragaster-5quot-tetraradiate-spicule-t-radial-tube-after-maas-do-do-fig-83transverse-section-of-the-body-wall-of-ute-passing-longi-tudinally-through-two-chambers-ap-apopyle-clo-dermal-ostium-fich-flagellated-chamber-or-radial-tube-ic-inhalant-canal-p-pro-sopyle-after-bendy-RDKH2C.jpg ". The Cambridge natural history. Zoology. Fio. 82.—Sycon raphanus. A, Longitudinal section of young decalcified Sponge at a stage somewhat later than that shown in Fig. 81. B, Transverse section of the same through a whorl of tubes, d. Dermal memhratte; <?, gastral membrane; H, paragaster ; 5^"*, tetraradiate spicule ; T, radial tube. (After Maas.) d.o d.o. Fig. 83.—Transverse section of the body-wall of Ute.^ passing longi- tudinally through two chambers. a.p, Apopyle ; cl.o, dermal ostium ; fi.ch, flagellated chamber or radial tube ; i.c, inhalant canal; p, pro- sopyle. (After Bendy. Stock Photo")
RMRDKH2C–. The Cambridge natural history. Zoology. Fio. 82.—Sycon raphanus. A, Longitudinal section of young decalcified Sponge at a stage somewhat later than that shown in Fig. 81. B, Transverse section of the same through a whorl of tubes, d. Dermal memhratte; <?, gastral membrane; H, paragaster ; 5^"*, tetraradiate spicule ; T, radial tube. (After Maas.) d.o d.o. Fig. 83.—Transverse section of the body-wall of Ute.^ passing longi- tudinally through two chambers. a.p, Apopyle ; cl.o, dermal ostium ; fi.ch, flagellated chamber or radial tube ; i.c, inhalant canal; p, pro- sopyle. (After Bendy.
RMRHKN9A–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. .4:.:* ' • •.--, • M I »•• .X Figure 19. Basal apparatus ot a choanocyte in the juvenile sponge of Leucosolenia lti.a about 72 h after settlement. C: collar. G: Golgi apparatus. Scale bar = 1 /urn. Figure 20. Fuzzy coat (F) of a choanocyte in the juvenile .sponge of Leucosolenia lau about 72 h after settlement. Scale bar = 0.5 /am. Figure 21. Scleroblast in the juvenile sponge of Leucosolenia la.a about 72 h after settlement. G glutinous granule. S: space occupied by a triradiate spicule. Scale bar = 2 jim. Figure 22. Two
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