ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOLUME 2 NUMBER 8 



LAND AND BRACKISH WATER MOLLUSCA 



OF COCOS ISLAND 



BY 



G. DALLAS HANNA and LEO GEORGE HERTLEIN 



CALIFORNIA ACADEMY OF SCIENCES 

 SAN FRANCISCO, CALIFORNIA 



* 



L I * 1^ -^ « > 







THE UNIVERSITY OF SOUTHERN CALIFORNIA PRESS 



LOS ANGELES, CALIFORNIA 



1938 



