^ 





UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



ZOOLOGY 



WILLIAM EMERSON RITTER 



AND 



CHARLES ATWOOD KOFOID 



EDITORS 



VOLUME XIII 

 WITH 39 PLATES 



^-L- 



^t^so 



nian 



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UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 

 1914-1916 



