Aylodontia pliaea, a Species of So-called Mountain 



Beaver. One of the Surviving Members of An Ancient 



Rodent Family Which Is Now Restricted to the Pacific 



Coast Region of the United States. 



Photographed from Animal Captured 



Near Olema, Marin County, California, and 



Biought to the California Museum of Vertebrate Zoology. 



The Oregon Ground Squirrel (CiteUus oregonus), One of 



Very Many Species of Ground Squirrels Inhabiting the 



Western United States, All of Which Do More or Less 



Injury to Grain or Other Crops. 



Photographed by H. C. Bryant Near Link River, 

 Klamath County, Oregon. 



PLATE XIV 



