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UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 10, No. 8, pp. 171-178, pi. 5 June 7, 1912 



THE TWO POCKET GOPHERS OF THE 



REGION CONTIGUOUS TO THE LOWER 



COLORADO RIVER, IN CALIFORNIA 



AND ARIZONA 



BY 



JOSEPH GRINNELL 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



