File:Britannica Echinoderma 2.jpg

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Britannica_Echinoderma_2.jpg (126 × 222 pixels, file size: 9 KB, MIME type: image/jpeg)

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English: An early stage in the development of Antedon, showing the foot-plate or “dorso-central” fp at the end of the stem col. Some of the thecal plates, infrabasals I B, basals B, and orals O are forming around the body-cavities r.pc and l.pc; p is the water-pore. (After Seeliger.)
Date
Source Encyclopædia Britannica, 1911
Author Encyclopædia Britannica, Volume 8, Slice 10., available freely at Project Gutenberg

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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.
Public domain This image comes from the Project Gutenberg archives. This is an image that has come from a book or document for which the American copyright has expired and this image is in the public domain in the United States and possibly other countries.

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This eBook is for the use of anyone anywhere at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this eBook or online at www.gutenberg.net.

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current15:45, 22 February 2011Thumbnail for version as of 15:45, 22 February 2011126 × 222 (9 KB)Keith Edkins (talk | contribs)=={{int:filedesc}}== {{Information |Description={{en|Supposed calycinal systems of free-moving Echinoderms. A, regular sea-urchin (''Cidaris''); B, sea-urchin with a suranal plate (''Salenia''); C, developing ophiurid (''Amphiura''); D, young starfish (''
15:40, 22 February 2011Thumbnail for version as of 15:40, 22 February 2011126 × 222 (9 KB)Keith Edkins (talk | contribs)=={{int:filedesc}}== {{Information |Description={{en|An early stage in the development of ''Antedon'', showing the foot-plate or “dorso-central” ''fp'' at the end of the stem ''col.'' Some of the thecal plates, infrabasals ''I B'', basals ''B'', and o

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