File:Britannica Echinoderma 16.jpg

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Britannica_Echinoderma_16.jpg (284 × 179 pixels, file size: 14 KB, MIME type: image/jpeg)

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Description
English: Section across the arm-skeleton of a Phanerozonate Asterid, Astropecten.

a, Ambulacral plates.
b, Adambulacral plates.
c and d, Inferior and superior lateral plates.

e, Dorsal plates with paxillae. Certain supra-ambulacral plates, which also exist, are not shown.
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.

Note: Not all works on Project Gutenberg are in the public domain. Some public domain works may have trademark restrictions where all references to the Project Gutenberg must be removed unless the following text is prominently displayed according to The Full Project Gutenberg License in Legalese (normative):

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current17:27, 22 February 2011Thumbnail for version as of 17:27, 22 February 2011284 × 179 (14 KB)Keith Edkins (talk | contribs)=={{int:filedesc}}== {{Information |Description={{en|Section across the arm-skeleton of a Phanerozonate Asterid, ''Astropecten''.<br /><br /> ''a'', Ambulacral plates.<br /> ''b'', Adambulacral plates.<br /> ''c'' and ''d'', Inferior and superior lateral

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