GEOLOGICAL SURVEY OF CALIFORNIA, 



J. D. WHITNEY, STATE GEOLOGIST. 



GEOGRAPHICAL 



CATALOGUE OF THE MOLLUSC A 



FOUND WEST OF THE ROCKY MOUNTAINS, 



liKTWEEN LATITUDES 33 AND 49? NORTH. 



BY J. G. COOPER, M.D. 



SAN FRANCISCO : 

 Towne & Bacon, Printers. 



1867. 



