DESCRIPTION 



OF THE 



FOSSILS AND SHELLS 



COLLECTED IN CALIFOBNIA 



BV 



WILLIAM P. BLAKE, 



GEOLOGIST OF THE UNITED STATES PACIFIC KAILROAD SURVEY I\ CALIFORNIA. UNDER THE 

 COMMAND OF LIEUT. R. S. WILLIAMSON, IN 1853-54. 



WASHINGTON, 1855. 



