UNIVERSITY OF CALIFORNIA PUBLICATIONS 



ZOOLOGY 



WILLIAM EMERSON RITTER 



- "'°nai 



JAN 4- 

 ^3ff|00 



AND 



CHARLES ATWOOD KOFOID 



. EDITORS 



VOLUME XII 

 WITH 22 PLATES 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 

 1913-1916 



