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File:EB1911 Gastropoda - Series of Stylommatophorous Pulmonata.jpg

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Summary

Description
English: A Series of Stylommatophorous Pulmonata, showing transitional forms between snail and slug. See legend below.
Date published 1911
Source “Gastropoda,” Encyclopædia Britannica (11th ed.), v. 11, 1911, p. 523, fig. 56.
Author From Keferstein. “B” also qualified “after Pfeiffer.”
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.
English: Legend:
A, Helix pomatia. (From Keferstein.)
B, Helicophanta brevipes. (From Keferstein, after Pfeiffer.)
C, Testacella haliotidea. (From Keferstein.)
D, Arion ater, the great black slug. (From Keferstein.)
a, Shell in A, B, C, shell-sac (closed) in D;
b, orifice leading into the sub-pallial chamber (lung).

File history

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Date/TimeThumbnailDimensionsUserComment
current17:03, 25 March 2019Thumbnail for version as of 17:03, 25 March 2019715 × 929 (242 KB)Bob Burkhardt{{Information |description ={{en|1=A Series of Stylommatophorous Pulmonata, showing transitional forms between snail and slug. See legend below.}} |date =published 1911 |source =“Gastropoda,” ''Encyclopædia Britannica'' (11th ed.), v. 11, 1911, p. 523, fig. 56. |author =From Keferstein. “B” also qualified “after Pfeiffer.” |permission ={{PD-Britannica}} }} Category:Gastropoda illustrations
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