I. 



DIAGNOSES 



NEW SPECIES OF MOLLUSKS, 



THE WEST TROPICAL REGION OF NORTH AMERICA, 



PRINCIPALLY COLLECTED BY THE RET. J. ROWELL, OP SAN PRANCISCO 



BY 



PHILIP P. CARPENTER, B. A., PH. D. 



From the Proceedings of the Zoological Society of London, pp. 278-282, 

 March 14, 1865. 



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