UNIVERSITY OF CALIFORNIA 



[GRINNELL-STORERI PLATE 31 



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a. Living Sierra Mountain Beaver (Aplodontia) captured .near head of Lyell Canon, 

 July 17, 1915. Note the small eye and ear, the apparent lack of tail, and the sluggish 

 appearance of the animal. The matted condition of the pelage is due to its being wet. 



h. Mouth of burrow of Sierra Mountain Beaver in boggy ground at Porcupine Flat. 

 Photograph taken July 2, 191.5. See text, p. lo(i. 



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