SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



252 



THE 



MOLLUSKS 



WESTERN NORTH AMERICA, 



BY 



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



EMBRACINO THE SECOND EEPOET MADE TO THE BRITISH ASSOCIATION 



ON THIS SUBJECT, WITH OTHER PAPERS ; REPRINTED BY 



PERMISSION, WITH A GENERAL INDEX. 



WASHINGTON: 

 SMITHSONIAlSr INSTITUTION 



DECEMBER, 1872. 



