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)
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.

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current17:36, 27 November 2018Thumbnail for version as of 17:36, 27 November 2018573 × 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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