DIAGNOSES 



NEW SPECIES OF MOLLUSKS, 



THE WEST TROPICAL REGION OE NORTH AMERICA, 

 PRINCIPALLY COLLECTED BY THE RET, J. ROWELL, OF SAN FRAKCISCO 



BY 



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



From the Proceedings of the Zoological Society of London, pp. 273-282, 

 March 14, 1865. 



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