File:EB1911 Tunicata - Metamorphosis of an Ascidian.jpg

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Description
English: Metamorphosis of an Ascidian. See legend below.
Date published 1911
Source “Tunicata,” Encyclopædia Britannica (11th ed.), v. 27, 1911, p. 384, fig. 15.
Author Modified from Kowalevsky and others from The Cambridge Natural History, vol. vii., “Fishes, &c.”
Permission
(Reusing this file)
Public domain This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States.
English: Legend:

A, Free-swimming tailed larva. B, The metamorphosis—larva attached. C, Tail and nervous system of larva degenerating. D, Further degeneration and metamorphosis of larva into E, the young fixed Ascidian.

at, Atrial invagination.
ch, Notochord.
hy, Hypoblast cells.
i, Intestine.
m, Mouth.
mes, Mesenteron.
nc, Neural canal.
nv, Neural vesicle with sense-organs.

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current23:06, 18 July 2019Thumbnail for version as of 23:06, 18 July 2019754 × 632 (160 KB)Library Guy{{Information |description ={{en|1=Metamorphosis of an Ascidian. See legend below.}} |date =published 1911 |source =“Tunicata,” ''Encyclopædia Britannica'' (11th ed.), v. 27, 1911, p. 384, fig. 15. |author =Modified from Kowalevsky and others from ''The Cambridge Natural History'', vol. vii., “Fishes, &c.” |permission ={{PD-Britannica}} }} {{en|Legend:}} {| |- | A, Free-swimming tailed larva. B, The metamorphosis—larva attached. C, Tail and nervous system of larva...