File:EB1911 Vole - Molars of the Water-Rat.jpg

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EB1911_Vole_-_Molars_of_the_Water-Rat.jpg (522 × 384 pixels, file size: 70 KB, MIME type: image/jpeg)

Description
English: Drawing of the upper and lower molars of the water-rat (or water-vole), Microtus (Arvicola) amphibius: In the upper jaw the first molar has 5, the second 4 and the third 4 prisms, of which the last is irregular and sometimes divided into two, making 5. In the lower jaw the first molar has 7 prisms, of which the 3 anterior are generally not fully separated from one another, the second 5 and the third 3.
Date published 1911
Source Encyclopædia Britannica (11th ed.), v. 28, 1911, “Vole,” p. 193.
Author Richard Lydekker
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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current16:57, 9 December 2016Thumbnail for version as of 16:57, 9 December 2016522 × 384 (70 KB)Library Guy{{Information |Description ={{en|1=Drawing of the upper and lower molars of the water-rat (or water-vole), ''Microtus'' (''Arvicola'') ''amphibius'': In the upper jaw the first molar has 5, the second 4 and the third 4 prisms, of which the last is i...