UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



Vol. 12, No. 15, pp. 413-495 March 20, 1916 



THE STATUS OF THE BEAVERS OF 



WESTERN NORTH AMERICA, WITH 



A CONSIDERATION OF THE 



FACTORS IN THEIR 



SPECIATION 



WALTER P. TAYLOR 



UNIVERSITY OP CALIFORNIA PRESS 

 BERKELEY 



