File:EB1911 Hydromedusae - formation of the Hydrotheca and Gonotheca in Calyptoblastic Hydroids.jpg

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Summary

Description

English: Diagrams to show the mode of formation of the Hydrotheca and Gonotheca in Calyptoblastic Hydroids. A-D are stages common to both; from D arises the hydrotheca (E) or the gonotheca (F); th, theca; st, stomach; t, tentacles; m, mouth; mb, medusa-buds.

Date

published 1911

Source

“Hydromedusae,” Encyclopædia Britannica (11th ed.), v. 14, 1911, p. 152, fig. 56.

Author

After Allman, Gymnoblastic Hydroids.

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, 1930. As such, this image is in the public domain in the United States.

File history

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:36, 27 November 2018		573 × 880 (139 KB)	Bob Burkhardt	{{Information \|description ={{en\|1=Diagrams to show the mode of formation of the Hydrotheca and Gonotheca in Calyptoblastic Hydroids. A-D are stages common to both; from D arises the hydrotheca (E) or the gonotheca (F); ''th'', theca; ''st'', stomach; ''t'', tentacles; ''m'', mouth; ''mb'', medusa-buds.}} \|date =published 1911 \|source =“Hydromedusae,” ''Encyclopædia Britannica'' (11th ed.), v. 14, 1911, p. 152, fig. 56. \|author =After Allman, ''Gymnoblastic Hydroids''...

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