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Echinarachnius Stock Photos and Images
RM2A601AM–A Sea-Cucumber (Pentacta Frondosa), Common Sea-Urchin (Strongylacentrotus Drobachiensis), Sand Dollar (Echinarachnius Parma), Star-Fish or 'Five Finger' (Asterias Forbesii) and several types of jellyfish (Zygodactyla Groenlandica, Aurelia Flavidula and Dactylometra Quinquecirra) Plate 277, 1890.
RM2A2MGY6–Echinarachnius parma, Print, Echinarachnius parma, the common sand dollar, is a species of sand dollar native to the Northern Hemisphere. It is found in the North Pacific and Northwest Atlantic, on the North American east coast from New Jersey north, as well as in Alaska, Siberia, British Columbia, and Japan. It inhabits isolated areas on sandy bottoms below the low tide level down to a depth of 5, 000 feet (1, 500 m
RMG1CTYT–A Sea-Cucumber (Pentacta Frondosa), Common Sea-Urchin (Strongylacentrotus Drobachiensis), Sand Dollar (Echinarachnius Parma), Star-Fish or 'Five Finger' (Asterias Forbesii) and several types of jellyfish (Zygodactyla Groenlandica, Aurelia Flavidula and Dactylometra Quinquecirra) Plate 277, 1890.
RMP24W56–. Echinarachnius parma 113 Echinarachnius parma - - Print - Iconographia Zoologica - Special Collections University of Amsterdam - UBAINV0274 106 05 0002
RF2J3T9C0–Sand Dollars at the beach with copy space, greeting card flat lay macro closeup. Burrowing sea urchin in the Clypeasteroida order, popular souvenirs.
RF2APT0NC–The sand dollar lies on the Pacific coast. Tofino, British Columbia. Sea cookie, snapper biscuit. Flattened disk-like sea urchins that live on sandy b
RMKPF51F–NC01058-00...NORTH CAROLINA - Sand dollar among the colorful rocks, broken shells and even a piece of coral on the beach near Ocracoke Island Campgrou
RMW7MHR2–Sand Dollars (Echinarachnius parma) in shallow water. San Quintin, Baja California, Mexico.
RMC3XX32–Skate (Rajidae) Egg Case with a sand dollar (Echinarachnius parma) on the floor of a cove. New England, USA, Atlantic Ocean
RMW7MHR1–Sand Dollar (Echinarachnius parma) on beach sand. San Quintin, Baja California, Mexico, April.
RF2ANXN18–White sand dollar Echinarachnius parma sitting in the middle of a circular blue plate background.
RM2AKB47T–Report of the Commissioner - United States Commission of Fish and Fisheries . No. 76S No. 773 EXPLANATION OF PLATE XXXV. Figure 265.—Leptosynapta Girardii, (p. 716;) anterior part of the body, enlarged one-half. 266.—The same; perforated plates from the skin, and the anchors, highlymagnified. 267.—Echinarachnius par ma, (p. 717;) upper surface with the spines partlyremoved, natural size; «, ambulacral zones; b, interamhulacralzones. 268.—Strongylocentrotus Drohachiensis, (p. 716;) side view, natural size. 269.—Asterias arenicola, (p. 718 ;) dorsal view, somewhat reduced. 270.—Ophiopholis acule
RFS326E1–Purple sand dollar surrounded by sea foam, washed up on the beach on Amelia Island, Florida.
RF2J3KTXP–Sand Dollars at the beach, flat lay macro closeup. Burrowing sea urchin in the Clypeasteroida order, used for decorations and souvenirs.
RMKPF51M–NC01060-00...NORTH CAROLINA - Sand dollar among the colorful rocks, broken shells and even a piece of coral on the beach near Ocracoke Island Campgrou
RMW7MHR4–Sand Dollar (Echinarachnius parma) with water in motion. San Quintin, Baja California, Mexico, April.
RF2X58K8W–close up of a sand dollar found at low tide on south end beach, jekyll island, in south georgia
RMGK47YM–47873 Echinarachnius parma, aboral view with spines (58); oral view with spines (59); aboral view wihout spines (60); oral view
RMMA9YRF–. Echinoderms of Connecticut . nhr. FIG. 14. Echinarachnius par-ma. Outline of plates on aboral surface; amb, ambulacral areas; inter, interambulacral areas; a, position of intestinal opening. The four genital pores are shown near the center of the disk. In contrast with the large spines of our regular sea-urchins, the disk-urchins are clothed everywhere with minute, slender, brownish or purplish spines, those on the upper surface being cov- ered with cilia, which cause currents of water to pass continually over the respiratory tube-feet. The tube-feet in the clypeastroids are specialized eith
RM2AN9CHN–North American index fossils, invertebrates . 1923.) Miocenic.Discoidal, orbicular, very much depressed, but swelling towards the middle, and depressed at apex; diameter 160 mm. X 150mm.Chesapeakean (Choptank) of Maryland. (Abundant.) 29. S. fairbanksi Merriam. Miocenic.Smaller than preceding (maximum diameter 36 mm.), broadest posteriorly; margin scarcely notched. Lower Miocenic (Vaqueros formation) of California. 592 NORTH AMERICAN INDEX FOSSILS. XX. EcHiNARACHNius Leske.Differs from Scufella in its excentric apical system. Pliocenic-Recent. 30. E. gibbsi Remond. Pliocenic.In outline much li
RMRWW5HY–Elements of comparative zoology (1904) Elements of comparative zoology elementsofcompar1904king Year: 1904 282 SYSTEMATIC ZOOLOGY. the lower surface; the vent is on the margin of the disc, or near the margin on the lower surface. It is interradial in position. Comparisons with forms like these, or better a A a FIG. 96.—A, oral, and B, aboral surfaces of sand-dollar (Echinarachnius). a, vent; g, genital pores; i, ambulacral areas; m, madreporite; o, mouth. with Spatangoids (infra), show why the odd or unpaired ray of a starfish is called the anterior ray (see Laboratory work). In a few of t
RF2J42EWH–Sand Dollars at the beach with copy space, greeting card flat lay macro closeup. Burrowing sea urchin in the Clypeasteroida order, popular souvenirs.
RMKPF51J–NC01059-00...NORTH CAROLINA - Sand dollar among the colorful rocks, broken shells and even a piece of coral on the beach near Ocracoke Island Campgrou
RMPFHX7B–. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. II. 189 Clypeaster subdepressus Echinanthus rosaceus Echinarachnius parma Mellita sexforis Neolampas rostellata Echinolampas depressa Conolampas Sigsbei Rhyncopygus caribbsearum Urechiuus naresianus Ponrtalesia miranda — Wandeli Aeropsis rostrata Aceste bellidifera Pakeotropus Josephinse Tlionisoni Homolampas fragilis Palteopneustes cristatus — hystrix Linopneustes longispinus Palseobrissus Hilgardi Hemiaster expergitus (Mentzi) Agfassizia excentrica Pcriaster limicola Brisaster fragilis Schizaster orbignyanus Ma
RM2AKB4N2–Report of the Commissioner - United States Commission of Fish and Fisheries . Fig. 262. Fig. 262a. Fig. 264.. No. 76S No. 773 EXPLANATION OF PLATE XXXV. Figure 265.—Leptosynapta Girardii, (p. 716;) anterior part of the body, enlarged one-half. 266.—The same; perforated plates from the skin, and the anchors, highlymagnified. 267.—Echinarachnius par ma, (p. 717;) upper surface with the spines partlyremoved, natural size; «, ambulacral zones; b, interamhulacralzones. 268.—Strongylocentrotus Drohachiensis, (p. 716;) side view, natural size. 269.—Asterias arenicola, (p. 718 ;) dorsal view, somewhat
RF2J4EC2X–Sand Dollars at the beach with copy space, greeting card flat lay macro closeup. Burrowing sea urchin in the Clypeasteroida order, popular souvenirs.
RMKPF51B–NC01057-00...NORTH CAROLINA - Sand dollar on the beach near Ocracoke Island Campground in Cape Hatteras National Seashore.
RM2AN9C0R–North American index fossils, invertebrates . Fig. 1924. Echinarachnius interline- Fig. 1925. Eciuiaraciniius excentri-atus, X Yz (After Merriam.) cus, X %• (After Merriam.) posterior pair of petals shortest; anterior petal open in front, theothers closed; periproct supramarginal; ambulacral furrows dichot-omise near peristome. Common in the Merced series of California. 32. E. excentricus Eschscholtz. (Fig. 1925.) Pliocenic-Recent. Apical system excentric, one third diameter from posterior end;posterior pair of petals shortest, wide and nearly closed; summit infront of apical system. Larger th
RM2AX1N7C–Memoirs of the Museum of Comparative Zoӧlogy, at Harvard College, Cambridge, Mass . Helicitype Co Boston.. PLATE 143. Plate 143.1-1. Echinarachnius asiaticus Mich. 1. Abtactinal view of partly denuded specimen from Kamtchatka, St. 3781. 2. Right-side view of same. 3. Actinal view of same. 4. Right-side view of another specimen from same station. 5-8. Echinarachnius parma var. obesa H. L. Clark. 5. Abactinal view of partly denuded specimen from Kamtchatka. 6. Right-side view of same. 7. Actinal view of same. 8. Right-side view of specimen from Komandorski Islands, St. 4786. All figures, natural
RMRFRHHY–. Carnegie Institution of Washington publication. JACKSON PLATE 7. 1, 2. Clypeaster placentoides. 3, 4. C. oxybaphon. 5, 6. Echinarachnius sebastiani. 7. Encope latus.. 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.. Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
RMRHKA67–. The biology of the cell surface. Cytology. THE BIOLOGY OF THE CELL SURFACE but properly the vitelline membrane. I have repeatedly followed the process in the egg of Arbacia, though it is not the most favorable form for this study. In the eggs of the genus Strongylocentrottis, of Echinus and of Echinarachnius, for example, the separation of the membrane is more easily followed. If eggs of Echinarachnius be inseminated with thin sperm- suspension, they throw off their membranes that are. Please note that these images are extracted from scanned page images that may have been digitally enhanced
RMRD1G64–. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. II. 189 Clypeaster subdepressus Echinanthus rosaceus Echinarachnius parma Mellita sexforis Neolampas rostellata Echinolampas depressa Conolampas Sigsbei Rhyncopygus caribbsearum Urechiuus naresianus Ponrtalesia miranda — Wandeli Aeropsis rostrata Aceste bellidifera Pakeotropus Josephinse Tlionisoni Homolampas fragilis Palteopneustes cristatus — hystrix Linopneustes longispinus Palseobrissus Hilgardi Hemiaster expergitus (Mentzi) Agfassizia excentrica Pcriaster limicola Brisaster fragilis Schizaster orbignyanus Ma
![. The biology of the cell surface. Cytology. ⦠6 iv"^ â¢*âºâ¢ ^' â y* Fig. / 29.âHistory of the middle-piece of the spermatozoon within the egg, Echinarachnius parma. (Original.). 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.. Just, Ernest Everett, 1883-1941. Philadelphia, P. Blakiston's son & co. , inc Stock Photo](https://c8.alamy.com/comp/RHK9FN/the-biology-of-the-cell-surface-cytology-6-ivquot-y-fig-29history-of-the-middle-piece-of-the-spermatozoon-within-the-egg-echinarachnius-parma-original-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-just-ernest-everett-1883-1941-philadelphia-p-blakistons-son-amp-co-inc-RHK9FN.jpg ". The biology of the cell surface. Cytology. ⦠6 iv"^ â¢*âºâ¢ ^' â y* Fig. / 29.âHistory of the middle-piece of the spermatozoon within the egg, Echinarachnius parma. (Original.). 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.. Just, Ernest Everett, 1883-1941. Philadelphia, P. Blakiston's son & co. , inc Stock Photo")
RMRHK9FN–. The biology of the cell surface. Cytology. ⦠6 iv"^ â¢*âºâ¢ ^' â y* Fig. / 29.âHistory of the middle-piece of the spermatozoon within the egg, Echinarachnius parma. (Original.). 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.. Just, Ernest Everett, 1883-1941. Philadelphia, P. Blakiston's son & co. , inc
RMRHMK2E–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 1. Diagrammatic oral surface of the sand dollar, Echinarachnius panna, showing length and width of the test. which was fastened to the opening between the bow and the rake proper. This basket was attached by means of wire. Method of measuring A vernier caliper calibrated on the main scale in millimeters and on the vernier to tenths was used for all the measurements. The spines were removed from those portions of the test where contact with the calipers was to be made. Length The distance from the edge where the anus i
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 105 the particular type of configuration in the centrosome is a matter of secondary importance, and that the centriole constitutes the most stable and constant feature of the whole astral system of which it forms the center." The fact that the terms, central body, centriole, and centrosome, are used in different ways by various authors causes much con- fusion. It would be desirable if the term centriole were applied only to a minute, period-like type of central body, such as occurs Stock Photo](https://c8.alamy.com/comp/RHP7J3/the-biological-bulletin-biology-zoology-biology-marine-biology-central-bodies-in-echinarachnius-eggs-105-the-particular-type-of-configuration-in-the-centrosome-is-a-matter-of-secondary-importance-and-that-the-centriole-constitutes-the-most-stable-and-constant-feature-of-the-whole-astral-system-of-which-it-forms-the-centerquot-the-fact-that-the-terms-central-body-centriole-and-centrosome-are-used-in-different-ways-by-various-authors-causes-much-con-fusion-it-would-be-desirable-if-the-term-centriole-were-applied-only-to-a-minute-period-like-type-of-central-body-such-as-occurs-RHP7J3.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 105 the particular type of configuration in the centrosome is a matter of secondary importance, and that the centriole constitutes the most stable and constant feature of the whole astral system of which it forms the center." The fact that the terms, central body, centriole, and centrosome, are used in different ways by various authors causes much con- fusion. It would be desirable if the term centriole were applied only to a minute, period-like type of central body, such as occurs Stock Photo")
RMRHP7J3–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 105 the particular type of configuration in the centrosome is a matter of secondary importance, and that the centriole constitutes the most stable and constant feature of the whole astral system of which it forms the center." The fact that the terms, central body, centriole, and centrosome, are used in different ways by various authors causes much con- fusion. It would be desirable if the term centriole were applied only to a minute, period-like type of central body, such as occurs
![. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. STATUS OF INVERTEBRATE PALEONTOLOGY, 1953 157 equivalent to that of the Recent, but the Pliocene with 26 species approaches the Recent fauna (39 non-scutellids). The scutellid echinoids with several extinct and short-ranged genera (Astro- dapsis, Merriamaster, Scutaster, and Scutellaster [=Anorthoscu- tum auct.]) as well as somewhat longer-ranging genera such as Echinarachnius, were obviously evolving rapidly in this area. However this apparent rapid evolution is possibly affected by a 3 Number of Species Or O o O a. Stock Photo](https://c8.alamy.com/comp/RGFKFJ/bulletin-of-the-museum-of-comparative-zoology-at-harvard-college-zoology-status-of-invertebrate-paleontology-1953-157-equivalent-to-that-of-the-recent-but-the-pliocene-with-26-species-approaches-the-recent-fauna-39-non-scutellids-the-scutellid-echinoids-with-several-extinct-and-short-ranged-genera-astro-dapsis-merriamaster-scutaster-and-scutellaster-=anorthoscu-tum-auct-as-well-as-somewhat-longer-ranging-genera-such-as-echinarachnius-were-obviously-evolving-rapidly-in-this-area-however-this-apparent-rapid-evolution-is-possibly-affected-by-a-3-number-of-species-or-o-o-o-a-RGFKFJ.jpg ". Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. STATUS OF INVERTEBRATE PALEONTOLOGY, 1953 157 equivalent to that of the Recent, but the Pliocene with 26 species approaches the Recent fauna (39 non-scutellids). The scutellid echinoids with several extinct and short-ranged genera (Astro- dapsis, Merriamaster, Scutaster, and Scutellaster [=Anorthoscu- tum auct.]) as well as somewhat longer-ranging genera such as Echinarachnius, were obviously evolving rapidly in this area. However this apparent rapid evolution is possibly affected by a 3 Number of Species Or O o O a. Stock Photo")
RMRGFKFJ–. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. STATUS OF INVERTEBRATE PALEONTOLOGY, 1953 157 equivalent to that of the Recent, but the Pliocene with 26 species approaches the Recent fauna (39 non-scutellids). The scutellid echinoids with several extinct and short-ranged genera (Astro- dapsis, Merriamaster, Scutaster, and Scutellaster [=Anorthoscu- tum auct.]) as well as somewhat longer-ranging genera such as Echinarachnius, were obviously evolving rapidly in this area. However this apparent rapid evolution is possibly affected by a 3 Number of Species Or O o O a.
RMRDYXAN–. Methods of study in natural history . Animals; Corals; Embryology. Common Sea-Urebin, Echinus, seen from above. * the body as in Polyps, or hollowed out of the substance of the body as in Jelly-Fishes, are here enclosed within independent walls of their own,. Echinarachnius, opened by a transverse or horiaontal section, and showing the internal arrangement: o, mouth ; eeeee, ambulacra, with their rami- fications cmcmcm; wwww, interambulacra. quite distinct from the wall of the body. But notwithstanding this difference, a transverse sec-. Please note that these images are extracted from scann
RMRHR7WM–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FERTILIZATION REACTION IN ECHINARACHNIUS PARMA. 5! cessful treatment with artificial agents it must be handled with extreme care to insure uniform results. 2. Echinarachnius eggs that form membranes through butyric acid treatment are completely activated since such eggs respond to subsequent hypertonic sea-water treatment with develop- ment that closely simulates the normal, and since eggs under- or over-exposed to butyric acid and which do not form mem- branes never form membranes following hypertonic sea-water treatment no
RMRDT2RF–. Seaside studies in natural history. Marine animals. 108 MAEINE ANIMALS OF MASSACHUSETTS BAT. bijstles entirely removed, the lines of sutiire of the plates com- posing it, and corresponding exactly to those of the spherical Sear-urchin, may very readily be seen, (a and i, Pig. 139.) This flat Sesrurchin or Echinarachnius, as it is called, belongs to a group of Sea-urchins known as Clypeastroids (shield-like Sea-urchins). In a section (Fig. 140) exposing the internal structure, one cannot but be reminded by its general aspect of J,. ^^ an Aurelia. Could one solidify an Aurelia it would present
RMRR4FGA–. [A biological survey of the waters of Woods Hole and vicinity. Marine animals; Marine plants. BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 271 CHART OF VINEYARD SOUND BUZZARDS BAY SHOWINC- DISTRIBUTION OF SPECIES }o< NEW BEDFOnD® 0. Chart 53.—Echinarachnius parma. (See explanation of chart 26.). 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.. United States. Bureau of Fisheries; Sumner, Francis Bertody, 1874-; Osburn,
RMRDKFJ5–. The Cambridge natural history. Zoology. SPATANGOIDEA SSI The sphaeridia are situated in open pits, one or two in each, situated at the bases of the tube-feet nearest the mouth. When the upper part of the test is picked away, the course of the alimentary canal is exposed (Fig. 247). It is very similar to the alimentary canal of Echinarachnius, except that from the first coil a large blind pouch, called the caecum, is given off. The water-vascular system shows many characteristic features. The tube-feet are confined to two rows in each ambulacrum, the scattered smaller feet found in such abund
![. The Cambridge natural history. Zoology. 544 ECHINODERMATA ECHINOIDEA spines; they are of the tridactyle, the gemmiform, and the ophi- cephalous types, but they have only two jaws. The ambulacral areas on the upper surface of the test can be distinguished only by the flattened respiratory tube-feet (Fig. 2^2, pod'), which can be seen protruding from between the spines. Below these areas are clearly marked, for in the centre of each. pod Fig. 242.—Aboral view of the "Sand-dollar" (Echinarachnius parma), with its spines, m.^, Madreporite ; pod^ small tube-foot with sucker; pod flatte Stock Photo](https://c8.alamy.com/comp/RDKFJJ/the-cambridge-natural-history-zoology-544-echinodermata-echinoidea-spines-they-are-of-the-tridactyle-the-gemmiform-and-the-ophi-cephalous-types-but-they-have-only-two-jaws-the-ambulacral-areas-on-the-upper-surface-of-the-test-can-be-distinguished-only-by-the-flattened-respiratory-tube-feet-fig-22-pod-which-can-be-seen-protruding-from-between-the-spines-below-these-areas-are-clearly-marked-for-in-the-centre-of-each-pod-fig-242aboral-view-of-the-quotsand-dollarquot-echinarachnius-parma-with-its-spines-m-madreporite-pod-small-tube-foot-with-sucker-pod-flatte-RDKFJJ.jpg ". The Cambridge natural history. Zoology. 544 ECHINODERMATA ECHINOIDEA spines; they are of the tridactyle, the gemmiform, and the ophi- cephalous types, but they have only two jaws. The ambulacral areas on the upper surface of the test can be distinguished only by the flattened respiratory tube-feet (Fig. 2^2, pod'), which can be seen protruding from between the spines. Below these areas are clearly marked, for in the centre of each. pod Fig. 242.—Aboral view of the "Sand-dollar" (Echinarachnius parma), with its spines, m.^, Madreporite ; pod^ small tube-foot with sucker; pod flatte Stock Photo")
RMRDKFJJ–. The Cambridge natural history. Zoology. 544 ECHINODERMATA ECHINOIDEA spines; they are of the tridactyle, the gemmiform, and the ophi- cephalous types, but they have only two jaws. The ambulacral areas on the upper surface of the test can be distinguished only by the flattened respiratory tube-feet (Fig. 2^2, pod'), which can be seen protruding from between the spines. Below these areas are clearly marked, for in the centre of each. pod Fig. 242.—Aboral view of the "Sand-dollar" (Echinarachnius parma), with its spines, m.^, Madreporite ; pod^ small tube-foot with sucker; pod flatte
RMRR4FHK–. [A biological survey of the waters of Woods Hole and vicinity. Marine animals; Marine plants. BIOIvOGICAIv SURVEY OF WOODS HOIvE AND VICINITY. 271. Chart 53.—Echinarachnius parma. (See explanation of chart 26.). 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.. Sumner, Francis Bertody, 1874-; Osburn, Raymond C. (Raymond Carroll), 1872-1955; Cole, Leon Jacob, 1877-; Davis, Bradley M. (Bradley Moore), b. 1871; United States.
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 117 •"• [. Z5 PHflSE TELOPHRSE Ihy I5rmn.t Iky. 30mm.± OF ECHINRRflCHNIUS EGGS [BOUIN'5 FICTION] LRTE Ihr. 30 TO,..* when rays are coarse. It appears and disappears as heavy well-formed rays appear and disappear. It enlarges and changes shape as the aster enlarges and changes shape. It is a coagulation artifact of ray sub- stance at the astral center produced only when rays are coarse. For discussion see pp. 115 and 118. when rays are delicate. They appear and disappear as coarse r Stock Photo](https://c8.alamy.com/comp/RHP785/the-biological-bulletin-biology-zoology-biology-marine-biology-central-bodies-in-echinarachnius-eggs-117-quot-z5-phflse-telophrse-ihy-i5rmnt-iky-30mm-of-echinrrflchnius-eggs-bouin5-fiction-lrte-ihr-30-to-when-rays-are-coarse-it-appears-and-disappears-as-heavy-well-formed-rays-appear-and-disappear-it-enlarges-and-changes-shape-as-the-aster-enlarges-and-changes-shape-it-is-a-coagulation-artifact-of-ray-sub-stance-at-the-astral-center-produced-only-when-rays-are-coarse-for-discussion-see-pp-115-and-118-when-rays-are-delicate-they-appear-and-disappear-as-coarse-r-RHP785.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 117 •"• [. Z5 PHflSE TELOPHRSE Ihy I5rmn.t Iky. 30mm.± OF ECHINRRflCHNIUS EGGS [BOUIN'5 FICTION] LRTE Ihr. 30 TO,..* when rays are coarse. It appears and disappears as heavy well-formed rays appear and disappear. It enlarges and changes shape as the aster enlarges and changes shape. It is a coagulation artifact of ray sub- stance at the astral center produced only when rays are coarse. For discussion see pp. 115 and 118. when rays are delicate. They appear and disappear as coarse r Stock Photo")
RMRHP785–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CENTRAL BODIES IN ECHINARACHNIUS EGGS. 117 •"• [. Z5 PHflSE TELOPHRSE Ihy I5rmn.t Iky. 30mm.± OF ECHINRRflCHNIUS EGGS [BOUIN'5 FICTION] LRTE Ihr. 30 TO,..* when rays are coarse. It appears and disappears as heavy well-formed rays appear and disappear. It enlarges and changes shape as the aster enlarges and changes shape. It is a coagulation artifact of ray sub- stance at the astral center produced only when rays are coarse. For discussion see pp. 115 and 118. when rays are delicate. They appear and disappear as coarse r
RMRHP55Y–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. DEFECTIVE PLUTEUS LARVAE. 387 larvae listed in column (5), Table II., showed defective skeletons. Two sets of these-—the Arbacia pair and one of the pairs from an Echinarachnius egg—were larvae of the one armed type illustrated in Fig. 3. The other two pairs of Echinarachnius larvae showed skeletons which were clearly complementary, that is the one member showed the parts which the other lacked. These two pairs of larvae are shown at the age of four days in Fig. 4, A and. A. Please note that these images are extracted from s
Search Results for Echinarachnius Stock Photos and Images (119)
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