File:EB1911 Gastropoda - Opisthobranch (Polycera).jpg
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Summary
| Description |
English: A, Veliger-larva of an Opisthobranch (Polycera). f, Foot; op, operculum; mn, anal papilla; ry, dry, two portions of unabsorbed nutritive yolk on either side of the intestine. The right otocyst is seen at the root of the foot.
B, Trochosphere of an Opisthobranch (Pleurobranchidium) showing—shgr, the shell-gland or primitive shell-sac; v, the cilia of the velum; ph, the commencing stomodaeum or oral invagination; ot, the left otocyst; pg, red-coloured pigment spot. C, Diblastula of an Opisthobranch (Polycera) with elongated blastopore oi. |
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| Date | published 1911 | |||
| Source | “Gastropoda,” Encyclopædia Britannica (11th ed.), v. 11, 1911, p. 518, fig. 36. | |||
| Author | from Lankester. | |||
| Permission (Reusing this file) |
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 16:43, 13 March 2019 | | 733 × 565 (112 KB) | Bob Burkhardt | {{Information |description ={{en|1=A, Veliger-larva of an Opisthobranch (''Polycera''). ''f'', Foot; ''op'', operculum; ''mn'', anal papilla; ''ry'', ''dry'', two portions of unabsorbed nutritive yolk on either side of the intestine. The right otocyst is seen at the root of the foot. B, Trochosphere of an Opisthobranch (''Pleurobranchidium'') showing—''shgr'', the shell-gland or primitive shell-sac; ''v'', the cilia of the velum; ''ph'', the commencing stomodaeum or oral invagination; ''ot... |
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