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Calcareous echinoidea Stock Photos and Images
Calcareous skeleton of sea urchin - Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/calcareous-skeleton-of-sea-urchin-image210758157.htmlRMP6TT51–Calcareous skeleton of sea urchin -
Women holding an urchin in her hand with isolated background. Shell of Sea Urchin or urchin. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/women-holding-an-urchin-in-her-hand-with-isolated-background-shell-of-sea-urchin-or-urchin-image216890969.htmlRFPGT6J1–Women holding an urchin in her hand with isolated background. Shell of Sea Urchin or urchin.
Calcareous skeleton of sea urchin Strongylocentrotus franciscanus Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/calcareous-skeleton-of-sea-urchin-strongylocentrotus-franciscanus-image210757753.htmlRMP6TRJH–Calcareous skeleton of sea urchin Strongylocentrotus franciscanus
Echinus esculentus, Common Sea Urchin. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/echinus-esculentus-common-sea-urchin-image216200271.htmlRMPFMNJ7–Echinus esculentus, Common Sea Urchin.
The shell of the sea urchin on the beach - Collage Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-the-shell-of-the-sea-urchin-on-the-beach-collage-28987332.htmlRFBK4DHT–The shell of the sea urchin on the beach - Collage
Irregular sea urchin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/irregular-sea-urchin-image490640289.htmlRF2KE6GKD–Irregular sea urchin
Sea urchin shells in a plastic bag Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-shells-in-a-plastic-bag-image523680602.htmlRF2NBYKXJ–Sea urchin shells in a plastic bag
sea urchin shell on the sand beach Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-shell-on-the-sand-beach-image499661454.htmlRF2M0WF7X–sea urchin shell on the sand beach
Sea echinus lying on the rocks,Arctic Ocean, Norway, sea, marine inhabitants Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-sea-echinus-lying-on-the-rocksarctic-ocean-norway-sea-marine-inhabitants-134891153.htmlRFHRCR15–Sea echinus lying on the rocks,Arctic Ocean, Norway, sea, marine inhabitants
Sea urchin shell isolated on white background Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-shell-isolated-on-white-background-image363887469.htmlRF2C40E51–Sea urchin shell isolated on white background
Dead sea urchin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-dead-sea-urchin-115253960.htmlRFGKE7GT–Dead sea urchin
sea urchin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-image244872534.htmlRMT6AWBJ–sea urchin
A basket of sea shells and urchins for sale on the docks at Charlestown in Cornwall, UK. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-a-basket-of-sea-shells-and-urchins-for-sale-on-the-docks-at-charlestown-89563576.htmlRMF5KY74–A basket of sea shells and urchins for sale on the docks at Charlestown in Cornwall, UK.
sea urchin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-image244762115.htmlRMT65TG3–sea urchin
Archive image from page 18 of The Danish Ingolf-Expedition (1903). The Danish Ingolf-Expedition danishingolfexpe0401ingo Year: 1903 ECHINOIDEA. I. i i Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially Stewart') have figured the spicules of many Echinoids; but they have not, any more than the pedicellarise, hitherto been of any importance in the classification. The sphaeridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/archive-image-from-page-18-of-the-danish-ingolf-expedition-1903-the-danish-ingolf-expedition-danishingolfexpe0401ingo-year-1903-echinoidea-i-i-i-tripneustes-they-are-dump-bell-shaped-and-in-many-genera-they-are-irregular-perforated-calcareous-plates-perrier-op-cit-and-especially-stewart-have-figured-the-spicules-of-many-echinoids-but-they-have-not-any-more-than-the-pedicellarise-hitherto-been-of-any-importance-in-the-classification-the-sphaeridia-do-not-appear-to-show-such-differences-in-structure-that-they-may-yield-system-atic-characters-on-the-other-hand-the-structure-image259442868.htmlRMW22J0M–Archive image from page 18 of The Danish Ingolf-Expedition (1903). The Danish Ingolf-Expedition danishingolfexpe0401ingo Year: 1903 ECHINOIDEA. I. i i Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially Stewart') have figured the spicules of many Echinoids; but they have not, any more than the pedicellarise, hitherto been of any importance in the classification. The sphaeridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure
Lectures on the comparative anatomy and physiology of the invertebrate animals : delivered at the Royal College of Surgeons . itacrini, the seminal or ovarian receptacles aremuch more numerous, and are of smaller size : they occupy the innerside of each of the pinnules, are covered by the soft perisome, anddischarge their contents by dehiscence. Echinoidea.—The calcareous pieces entering into the compositionof the complex skeleton of the Echinus are those of the shell, of thebuccal apparatus called the lantern, of the ambulacral tubes, andof the pedicellarias. All the Echini are admirable for Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/lectures-on-the-comparative-anatomy-and-physiology-of-the-invertebrate-animals-delivered-at-the-royal-college-of-surgeons-itacrini-the-seminal-or-ovarian-receptacles-aremuch-more-numerous-and-are-of-smaller-size-they-occupy-the-innerside-of-each-of-the-pinnules-are-covered-by-the-soft-perisome-anddischarge-their-contents-by-dehiscence-echinoideathe-calcareous-pieces-entering-into-the-compositionof-the-complex-skeleton-of-the-echinus-are-those-of-the-shell-of-thebuccal-apparatus-called-the-lantern-of-the-ambulacral-tubes-andof-the-pedicellarias-all-the-echini-are-admirable-for-image338092149.htmlRM2AJ1BYH–Lectures on the comparative anatomy and physiology of the invertebrate animals : delivered at the Royal College of Surgeons . itacrini, the seminal or ovarian receptacles aremuch more numerous, and are of smaller size : they occupy the innerside of each of the pinnules, are covered by the soft perisome, anddischarge their contents by dehiscence. Echinoidea.—The calcareous pieces entering into the compositionof the complex skeleton of the Echinus are those of the shell, of thebuccal apparatus called the lantern, of the ambulacral tubes, andof the pedicellarias. All the Echini are admirable for
Beach scene with two dead sea urchin shells Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-beach-scene-with-two-dead-sea-urchin-shells-51698958.htmlRFD032FA–Beach scene with two dead sea urchin shells
 have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no Stock Photo")
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-danish-ingolf-expedition-marine-animals-arctic-regions-scientific-expeditions-arctic-regions-echinoidea-i-ii-tripneustes-they-are-dump-bell-shaped-and-in-many-genera-they-are-irregular-perforated-calcareous-plates-perrier-op-cit-and-especially-vstewartquot-have-figured-the-spicules-of-many-echinoids-but-they-have-not-anv-more-than-the-pedicellariai-hitherto-been-of-any-importance-in-the-classification-the-sphajridia-do-not-appear-to-show-such-differences-in-structure-that-they-may-yield-system-atic-characters-on-the-other-hand-the-structure-of-the-spines-is-of-no-image216121202.htmlRMPFH4PA–. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no
Beach scene with two dead sea urchin shells on a sunny day Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-beach-scene-with-two-dead-sea-urchin-shells-on-a-sunny-day-51674316.htmlRFD01Y38–Beach scene with two dead sea urchin shells on a sunny day
animal beach seaside the beach seashore shell salt water sea ocean water dead Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-animal-beach-seaside-the-beach-seashore-shell-salt-water-sea-ocean-142092523.htmlRFJ74TCY–animal beach seaside the beach seashore shell salt water sea ocean water dead
Women holding an urchin in her hand with isolated white background. Shell of Sea Urchin or urchin. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/women-holding-an-urchin-in-her-hand-with-isolated-white-background-shell-of-sea-urchin-or-urchin-image216890970.htmlRFPGT6J2–Women holding an urchin in her hand with isolated white background. Shell of Sea Urchin or urchin.
Calcareous skeleton of sea urchin Phyllacanthus imperialis Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/calcareous-skeleton-of-sea-urchin-phyllacanthus-imperialis-image210757942.htmlRMP6TRWA–Calcareous skeleton of sea urchin Phyllacanthus imperialis
Beach scene with two dead sea urchin shells and a bottle of water Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/stock-photo-beach-scene-with-two-dead-sea-urchin-shells-and-a-bottle-of-water-51710798.htmlRFD03HJ6–Beach scene with two dead sea urchin shells and a bottle of water
Calcareous skeleton of sea urchin - genus Brissus. Spain. Europe Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/calcareous-skeleton-of-sea-urchin-genus-brissus-spain-europe-image210758110.htmlRMP6TT3A–Calcareous skeleton of sea urchin - genus Brissus. Spain. Europe
Sea urchin shell isolated on white background. Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-shell-isolated-on-white-background-image363887479.htmlRF2C40E5B–Sea urchin shell isolated on white background.
sea urchin Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/sea-urchin-image244762113.htmlRMT65TG1–sea urchin
 have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no Stock Photo")
. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-danish-ingolf-expedition-marine-animals-arctic-regions-scientific-expeditions-arctic-regions-echinoidea-i-ii-tripneustes-they-are-dump-bell-shaped-and-in-many-genera-they-are-irregular-perforated-calcareous-plates-perrier-op-cit-and-especially-vstewartquot-have-figured-the-spicules-of-many-echinoids-but-they-have-not-anv-more-than-the-pedicellariai-hitherto-been-of-any-importance-in-the-classification-the-sphajridia-do-not-appear-to-show-such-differences-in-structure-that-they-may-yield-system-atic-characters-on-the-other-hand-the-structure-of-the-spines-is-of-no-image231810446.htmlRMRD3TGE–. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. ECHINOIDEA. I. II Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially vStewart") have figured the spicules of many Echinoids; but they have not, anv more than the pedicellariai, hitherto been of any importance in the classification. The sphajridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no
. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. I. i i Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially Stewart') have figured the spicules of many Echinoids; but they have not, any more than the pedicellarise, hitherto been of any importance in the classification. The sphaeridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no small systematic importance, as especial Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-danish-ingolf-expedition-scientific-expeditions-arctic-ocean-echinoidea-i-i-i-tripneustes-they-are-dump-bell-shaped-and-in-many-genera-they-are-irregular-perforated-calcareous-plates-perrier-op-cit-and-especially-stewart-have-figured-the-spicules-of-many-echinoids-but-they-have-not-any-more-than-the-pedicellarise-hitherto-been-of-any-importance-in-the-classification-the-sphaeridia-do-not-appear-to-show-such-differences-in-structure-that-they-may-yield-system-atic-characters-on-the-other-hand-the-structure-of-the-spines-is-of-no-small-systematic-importance-as-especial-image216138235.htmlRMPFHXEK–. The Danish Ingolf-Expedition. Scientific expeditions; Arctic Ocean. ECHINOIDEA. I. i i Tripneustes they are dump-bell-shaped, and in many genera they are irregular, perforated calcareous plates. Perrier (op. cit.) and especially Stewart') have figured the spicules of many Echinoids; but they have not, any more than the pedicellarise, hitherto been of any importance in the classification. The sphaeridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hand the structure of the spines is of no small systematic importance, as especial
. Echinoidea. Sea urchins. ECHINOIDEA. I. II Tripneustcs tlie}- are dump-bell-shaped, and in many genera they are irregular, perforated calcareous piates. Perrier (op. cit.) and especially Stewart') have figured the spiciiles of many Ecliinoids; but they have not, any more than the pedicellariæ, hitherto been of any importance in the classification. The sphæridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hånd the structure of the spines is of no small systematic importance, as especially shown by Mackintosh (264—265), and they Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/echinoidea-sea-urchins-echinoidea-i-ii-tripneustcs-tlie-are-dump-bell-shaped-and-in-many-genera-they-are-irregular-perforated-calcareous-piates-perrier-op-cit-and-especially-stewart-have-figured-the-spiciiles-of-many-ecliinoids-but-they-have-not-any-more-than-the-pedicellari-hitherto-been-of-any-importance-in-the-classification-the-sphridia-do-not-appear-to-show-such-differences-in-structure-that-they-may-yield-system-atic-characters-on-the-other-hnd-the-structure-of-the-spines-is-of-no-small-systematic-importance-as-especially-shown-by-mackintosh-264265-and-they-image232424981.htmlRMRE3TC5–. Echinoidea. Sea urchins. ECHINOIDEA. I. II Tripneustcs tlie}- are dump-bell-shaped, and in many genera they are irregular, perforated calcareous piates. Perrier (op. cit.) and especially Stewart') have figured the spiciiles of many Ecliinoids; but they have not, any more than the pedicellariæ, hitherto been of any importance in the classification. The sphæridia do not appear to show such differences in structure that they may yield system- atic characters. On the other hånd the structure of the spines is of no small systematic importance, as especially shown by Mackintosh (264—265), and they
. Text book of zoology. Zoology. Glass 3. Echinoidea. 137. Movable calcareous spines articulate with, the smooth prominences of the numerous tubercles mentioned aboye, and are attached to the shell by muscle fibres. In the Eegular Urchins the spines are usually of considerable importance; in some^ they are very long and thick, and serve as locomotor organs, accessory to the tube-feet; in irregular forms, on the contrary, they remain small and thin, or even bristle-like. All the spines in the same individual, however, are by no means of equal size; those with the large kind also exhibit smaller Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/text-book-of-zoology-zoology-glass-3-echinoidea-137-movable-calcareous-spines-articulate-with-the-smooth-prominences-of-the-numerous-tubercles-mentioned-aboye-and-are-attached-to-the-shell-by-muscle-fibres-in-the-eegular-urchins-the-spines-are-usually-of-considerable-importance-in-some-they-are-very-long-and-thick-and-serve-as-locomotor-organs-accessory-to-the-tube-feet-in-irregular-forms-on-the-contrary-they-remain-small-and-thin-or-even-bristle-like-all-the-spines-in-the-same-individual-however-are-by-no-means-of-equal-size-those-with-the-large-kind-also-exhibit-smaller-image232422880.htmlRMRE3NN4–. Text book of zoology. Zoology. Glass 3. Echinoidea. 137. Movable calcareous spines articulate with, the smooth prominences of the numerous tubercles mentioned aboye, and are attached to the shell by muscle fibres. In the Eegular Urchins the spines are usually of considerable importance; in some^ they are very long and thick, and serve as locomotor organs, accessory to the tube-feet; in irregular forms, on the contrary, they remain small and thin, or even bristle-like. All the spines in the same individual, however, are by no means of equal size; those with the large kind also exhibit smaller
. A manual of zoology. Zoology. IV. ECniNOIDEA. 513 Class IV. Echinoidea (Sea Urchins). The structure of the sen urchins is best understood in the spherical forms (figs. 328, 330). Moutli and anus lie at opposite poles of the main axis, each open- ing immediately surrounded hy areas covered by calcareous plates, the arrangement of which varies with the family. Around the anus is the periproct, around the mouth the peristome, the latter bearing sphasridia and in the Echinoids five pairs of interambulacral gills. Be- tween peristome and periproct the body wall is composed of calcareous plates, w Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/a-manual-of-zoology-zoology-iv-ecninoidea-513-class-iv-echinoidea-sea-urchins-the-structure-of-the-sen-urchins-is-best-understood-in-the-spherical-forms-figs-328-330-moutli-and-anus-lie-at-opposite-poles-of-the-main-axis-each-open-ing-immediately-surrounded-hy-areas-covered-by-calcareous-plates-the-arrangement-of-which-varies-with-the-family-around-the-anus-is-the-periproct-around-the-mouth-the-peristome-the-latter-bearing-sphasridia-and-in-the-echinoids-five-pairs-of-interambulacral-gills-be-tween-peristome-and-periproct-the-body-wall-is-composed-of-calcareous-plates-w-image232347224.htmlRMRE0974–. A manual of zoology. Zoology. IV. ECniNOIDEA. 513 Class IV. Echinoidea (Sea Urchins). The structure of the sen urchins is best understood in the spherical forms (figs. 328, 330). Moutli and anus lie at opposite poles of the main axis, each open- ing immediately surrounded hy areas covered by calcareous plates, the arrangement of which varies with the family. Around the anus is the periproct, around the mouth the peristome, the latter bearing sphasridia and in the Echinoids five pairs of interambulacral gills. Be- tween peristome and periproct the body wall is composed of calcareous plates, w
![. The Cambridge natural history. Zoology. LARVAL FORMS 607 Dipleurula. He named this one Pluteus (easel), from a fancied resemblance, when turned upside down, to a painter's easel. The same name was bestowed on the next type, to which it presents a superficial resemblance, and hence the distinguishing prefix " Ophio-" was added to the original name by Mortensen. (3) The Uchinopluteiis, the larva of the Echinoidea. This type is strikingly like the preceding one in possessing a very small prae-oral lobe and in having the processes of the ciliated ring supported by calcareous rods, but Stock Photo](https://c8.alamy.com/comp/RDMC61/the-cambridge-natural-history-zoology-larval-forms-607-dipleurula-he-named-this-one-pluteus-easel-from-a-fancied-resemblance-when-turned-upside-down-to-a-painters-easel-the-same-name-was-bestowed-on-the-next-type-to-which-it-presents-a-superficial-resemblance-and-hence-the-distinguishing-prefix-quot-ophio-quot-was-added-to-the-original-name-by-mortensen-3-the-uchinopluteiis-the-larva-of-the-echinoidea-this-type-is-strikingly-like-the-preceding-one-in-possessing-a-very-small-prae-oral-lobe-and-in-having-the-processes-of-the-ciliated-ring-supported-by-calcareous-rods-but-RDMC61.jpg ". The Cambridge natural history. Zoology. LARVAL FORMS 607 Dipleurula. He named this one Pluteus (easel), from a fancied resemblance, when turned upside down, to a painter's easel. The same name was bestowed on the next type, to which it presents a superficial resemblance, and hence the distinguishing prefix " Ophio-" was added to the original name by Mortensen. (3) The Uchinopluteiis, the larva of the Echinoidea. This type is strikingly like the preceding one in possessing a very small prae-oral lobe and in having the processes of the ciliated ring supported by calcareous rods, but Stock Photo")
. The Cambridge natural history. Zoology. LARVAL FORMS 607 Dipleurula. He named this one Pluteus (easel), from a fancied resemblance, when turned upside down, to a painter's easel. The same name was bestowed on the next type, to which it presents a superficial resemblance, and hence the distinguishing prefix " Ophio-" was added to the original name by Mortensen. (3) The Uchinopluteiis, the larva of the Echinoidea. This type is strikingly like the preceding one in possessing a very small prae-oral lobe and in having the processes of the ciliated ring supported by calcareous rods, but Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/the-cambridge-natural-history-zoology-larval-forms-607-dipleurula-he-named-this-one-pluteus-easel-from-a-fancied-resemblance-when-turned-upside-down-to-a-painters-easel-the-same-name-was-bestowed-on-the-next-type-to-which-it-presents-a-superficial-resemblance-and-hence-the-distinguishing-prefix-quot-ophio-quot-was-added-to-the-original-name-by-mortensen-3-the-uchinopluteiis-the-larva-of-the-echinoidea-this-type-is-strikingly-like-the-preceding-one-in-possessing-a-very-small-prae-oral-lobe-and-in-having-the-processes-of-the-ciliated-ring-supported-by-calcareous-rods-but-image232173929.htmlRMRDMC61–. The Cambridge natural history. Zoology. LARVAL FORMS 607 Dipleurula. He named this one Pluteus (easel), from a fancied resemblance, when turned upside down, to a painter's easel. The same name was bestowed on the next type, to which it presents a superficial resemblance, and hence the distinguishing prefix " Ophio-" was added to the original name by Mortensen. (3) The Uchinopluteiis, the larva of the Echinoidea. This type is strikingly like the preceding one in possessing a very small prae-oral lobe and in having the processes of the ciliated ring supported by calcareous rods, but
. Elementary text-book of zoology. 172 ARCHICGELOMATA. Fig. gS.—A Britti.estar (Natural size).. View of oral surface showing mouth and genital pores. Notice the jointed arms. Class III.—Echinoidea (Sea-urchins).—These are spherical or oval in shape, and the calcareous skeleton forms a continuous mass of plates hearing spines. The anus opens at one pole and is sur- riSunded by five genital plates which are inter-radial. One forms the madreporite and a genital opening is situated on each. Between these there lie the smaller oculars. They bear the simple eyes and are radials. From these ten plate Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/elementary-text-book-of-zoology-172-archicgelomata-fig-gsa-brittiestar-natural-size-view-of-oral-surface-showing-mouth-and-genital-pores-notice-the-jointed-arms-class-iiiechinoidea-sea-urchinsthese-are-spherical-or-oval-in-shape-and-the-calcareous-skeleton-forms-a-continuous-mass-of-plates-hearing-spines-the-anus-opens-at-one-pole-and-is-sur-risunded-by-five-genital-plates-which-are-inter-radial-one-forms-the-madreporite-and-a-genital-opening-is-situated-on-each-between-these-there-lie-the-smaller-oculars-they-bear-the-simple-eyes-and-are-radials-from-these-ten-plate-image232090356.htmlRMRDGHH8–. Elementary text-book of zoology. 172 ARCHICGELOMATA. Fig. gS.—A Britti.estar (Natural size).. View of oral surface showing mouth and genital pores. Notice the jointed arms. Class III.—Echinoidea (Sea-urchins).—These are spherical or oval in shape, and the calcareous skeleton forms a continuous mass of plates hearing spines. The anus opens at one pole and is sur- riSunded by five genital plates which are inter-radial. One forms the madreporite and a genital opening is situated on each. Between these there lie the smaller oculars. They bear the simple eyes and are radials. From these ten plate
![. Principles of economic zoo?logy. Zoology, Economic. 58 BRANCH EOHINODERMATA stars. The one most common on our shores (Ophiopholis) is of a " general red hue spotted with brown and paler red." CLASS III. ECHINOIDEA The globular or disk-like sea-urchins have the pentameral plan, as a cleaned " test " or shell (Fig. 44) will show. The body wall is composed of several hundred pentagonal calcareous plates arranged in regular order in twenty rows, the whole forming a sort of thin case or shell (see Fig. 44).. Fig. 44.—Sea-urchin (Echi'nus micros'tunid) with spines nearly all re Stock Photo](https://c8.alamy.com/comp/RDT2GA/principles-of-economic-zoology-zoology-economic-58-branch-eohinodermata-stars-the-one-most-common-on-our-shores-ophiopholis-is-of-a-quot-general-red-hue-spotted-with-brown-and-paler-redquot-class-iii-echinoidea-the-globular-or-disk-like-sea-urchins-have-the-pentameral-plan-as-a-cleaned-quot-test-quot-or-shell-fig-44-will-show-the-body-wall-is-composed-of-several-hundred-pentagonal-calcareous-plates-arranged-in-regular-order-in-twenty-rows-the-whole-forming-a-sort-of-thin-case-or-shell-see-fig-44-fig-44sea-urchin-echinus-microstunid-with-spines-nearly-all-re-RDT2GA.jpg ". Principles of economic zoo?logy. Zoology, Economic. 58 BRANCH EOHINODERMATA stars. The one most common on our shores (Ophiopholis) is of a " general red hue spotted with brown and paler red." CLASS III. ECHINOIDEA The globular or disk-like sea-urchins have the pentameral plan, as a cleaned " test " or shell (Fig. 44) will show. The body wall is composed of several hundred pentagonal calcareous plates arranged in regular order in twenty rows, the whole forming a sort of thin case or shell (see Fig. 44).. Fig. 44.—Sea-urchin (Echi'nus micros'tunid) with spines nearly all re Stock Photo")
. Principles of economic zoo?logy. Zoology, Economic. 58 BRANCH EOHINODERMATA stars. The one most common on our shores (Ophiopholis) is of a " general red hue spotted with brown and paler red." CLASS III. ECHINOIDEA The globular or disk-like sea-urchins have the pentameral plan, as a cleaned " test " or shell (Fig. 44) will show. The body wall is composed of several hundred pentagonal calcareous plates arranged in regular order in twenty rows, the whole forming a sort of thin case or shell (see Fig. 44).. Fig. 44.—Sea-urchin (Echi'nus micros'tunid) with spines nearly all re Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/principles-of-economic-zoology-zoology-economic-58-branch-eohinodermata-stars-the-one-most-common-on-our-shores-ophiopholis-is-of-a-quot-general-red-hue-spotted-with-brown-and-paler-redquot-class-iii-echinoidea-the-globular-or-disk-like-sea-urchins-have-the-pentameral-plan-as-a-cleaned-quot-test-quot-or-shell-fig-44-will-show-the-body-wall-is-composed-of-several-hundred-pentagonal-calcareous-plates-arranged-in-regular-order-in-twenty-rows-the-whole-forming-a-sort-of-thin-case-or-shell-see-fig-44-fig-44sea-urchin-echinus-microstunid-with-spines-nearly-all-re-image232254186.htmlRMRDT2GA–. Principles of economic zoo?logy. Zoology, Economic. 58 BRANCH EOHINODERMATA stars. The one most common on our shores (Ophiopholis) is of a " general red hue spotted with brown and paler red." CLASS III. ECHINOIDEA The globular or disk-like sea-urchins have the pentameral plan, as a cleaned " test " or shell (Fig. 44) will show. The body wall is composed of several hundred pentagonal calcareous plates arranged in regular order in twenty rows, the whole forming a sort of thin case or shell (see Fig. 44).. Fig. 44.—Sea-urchin (Echi'nus micros'tunid) with spines nearly all re
. Principles of modern biology. Biology. The Animal Kingdom - 661 Fig. 32-33. Echinoderms, rep- resenting the five classes. A, a sea urchin, Class Echinoidea; B, a sea lilly, Class Crinoidea; C, a sea cucumber, Class Holo- thuroidea; D, a brittle star, Class Ophiuroidea; and E, a common starfish, Class Asteroi- dea. (From General Zoology, by Miller and Haub. Holt, Rinehart and Winston, Inc.). Embedded in the body wall there is an endo- skeleton, consisting of a number of hard calcareous plates, the ossicles; and projecting outward from the body there are many cal- careous spines. Collectively Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/principles-of-modern-biology-biology-the-animal-kingdom-661-fig-32-33-echinoderms-rep-resenting-the-five-classes-a-a-sea-urchin-class-echinoidea-b-a-sea-lilly-class-crinoidea-c-a-sea-cucumber-class-holo-thuroidea-d-a-brittle-star-class-ophiuroidea-and-e-a-common-starfish-class-asteroi-dea-from-general-zoology-by-miller-and-haub-holt-rinehart-and-winston-inc-embedded-in-the-body-wall-there-is-an-endo-skeleton-consisting-of-a-number-of-hard-calcareous-plates-the-ossicles-and-projecting-outward-from-the-body-there-are-many-cal-careous-spines-collectively-image232336453.htmlRMRDYRED–. Principles of modern biology. Biology. The Animal Kingdom - 661 Fig. 32-33. Echinoderms, rep- resenting the five classes. A, a sea urchin, Class Echinoidea; B, a sea lilly, Class Crinoidea; C, a sea cucumber, Class Holo- thuroidea; D, a brittle star, Class Ophiuroidea; and E, a common starfish, Class Asteroi- dea. (From General Zoology, by Miller and Haub. Holt, Rinehart and Winston, Inc.). Embedded in the body wall there is an endo- skeleton, consisting of a number of hard calcareous plates, the ossicles; and projecting outward from the body there are many cal- careous spines. Collectively
. Elementary text-book of zoology. Zoology. ASTEROIDEA. which reach from the mouth to the end of the arms, and are articulated together like vertebrae. The skeleton of the Asteroidea is distinguished from the globular or flattened shell of the Echinoidea by the fact that the ambulacra! and interambulacral plates are confined to the ventral surface, and that on the outer side of the former there is a deep ambidacral yroove, which contains, outside the ossicles and beneath the soft skin (which in Ophiurids possesses special calcareous plates), the nerve trunks, the peri- haemal canals with the b Stock Photohttps://www.alamy.com/image-license-details/?v=1https://www.alamy.com/elementary-text-book-of-zoology-zoology-asteroidea-which-reach-from-the-mouth-to-the-end-of-the-arms-and-are-articulated-together-like-vertebrae-the-skeleton-of-the-asteroidea-is-distinguished-from-the-globular-or-flattened-shell-of-the-echinoidea-by-the-fact-that-the-ambulacra!-and-interambulacral-plates-are-confined-to-the-ventral-surface-and-that-on-the-outer-side-of-the-former-there-is-a-deep-ambidacral-yroove-which-contains-outside-the-ossicles-and-beneath-the-soft-skin-which-in-ophiurids-possesses-special-calcareous-plates-the-nerve-trunks-the-peri-haemal-canals-with-the-b-image231687359.htmlRMRCX7GF–. Elementary text-book of zoology. Zoology. ASTEROIDEA. which reach from the mouth to the end of the arms, and are articulated together like vertebrae. The skeleton of the Asteroidea is distinguished from the globular or flattened shell of the Echinoidea by the fact that the ambulacra! and interambulacral plates are confined to the ventral surface, and that on the outer side of the former there is a deep ambidacral yroove, which contains, outside the ossicles and beneath the soft skin (which in Ophiurids possesses special calcareous plates), the nerve trunks, the peri- haemal canals with the b
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