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File:Britannica Shark Egg-shell.png

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Description
English: Drawing of the egg shell of the Port Jackson shark, Heterodontus philippi
Date published 1911
Source Encyclopædia Britannica, 11th ed., Vol. 24, p. 807
Author Albert Charles Lewis Gotthilf Guenther; John Graham Kerr
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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.

Caption: Fig. 8 — Egg-shell of same fish (× ½). I., External view; II., section; a and b, the two spiral ridges; c, cavity for the ovum.

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current12:21, 8 July 2009Thumbnail for version as of 12:21, 8 July 2009799 × 971 (43 KB)Bob Burkhardt (talk | contribs){{Information |Description={{en|1=Drawing of the egg shell of the Port Jackson shark, ''Heterodontus philippi''}} |Source=Encyclopædia Britannica, 11th ed., Vol. 24, p. 807 |Author=Albert Charles Lewis Gotthilf Guenther; John Graham Kerr |Date=published

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