SMITHSONIA]^ MISCELLANEOUS COLLECTIONS. 



_ 252 



THE 



MOLLUSKS 



WESTERN NORTH AMERICA 



BY 

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



EMBRACING THE SECOND REPORT MADE TO THE BRITISH ASSOCIATION 



ON THIS SUBJECT, WITH OTHER PAPERS ; REPRINTED BY 



PERMISSION, WITH A GENERAL INDEX. 



WASHINGTON: 

 SMITHSONIAN INSTITUTION 



DECEMBER, 1872. 



