File:EB1911 Hydromedusae - Budding from the Ectoderm in Margellium.jpg

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Summary

Description

English: Budding from the Ectoderm (germinal epithelium) in Margellium (see legend below).

Date

published 1911

Source

“Hydromedusae,” Encyclopædia Britannica (11th ed.), v. 14, 1911, p. 148, fig. 47.

Author

After C. Chun.

Permission
(Reusing this file)

This image comes from the 13^th 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,	The epithelium becomes two-layered.
B,	The lower layer forms a solid mass of cells, which (C) becomes a vesicle, the future endoderm, containing the coelenteric cavity (coel), while the outer layer furnishes the future ectoderm.
D, E, F,	a thickening of the ectoderm on the distal side of the bud forms an entocodon (Gc).
G, H,	Formation of the medusae.
s.c,	Sub-umbral cavity.
r.c,	Radial canal.
st,	Stomach, which in H acquires a secondary communication with the digestive cavity of the mother.
cc,	Circular canal.
v,	Velum.
t,	Tentacle.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:35, 16 November 2018		869 × 667 (143 KB)	Library Guy	{{Information \|description ={{en\|1=Budding from the Ectoderm (germinal epithelium) in ''Margellium'' (see legend below).}} \|date =published 1911 \|source =“Hydromedusae,” ''Encyclopædia Britannica'' (11th ed.), v. 14, 1911, p. 148, fig. 47. \|author =After C. Chun. \|permission ={{PD-Britannica}} }} {{en\|Legend:}} {\| \|-valign="top" \|A,\|\|The epithelium becomes two-layered. \|-valign="top" \|B,\|\|The lower layer forms a solid mass of cells, which (C) becomes a vesicle, the...

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