SMITHSONIAN MISCELLANEOUS COLLECTIONS. 



144 



LAND AND FRESII-WATER SHELLS 



NORTH AMEEICA. 



FART III. 



AMPULLARIILiE, VALVATIDJl, VIVIPARIDJ;, FRESH-WATER 



RISSOID,^, CYCLOPHORIDiE, TRUNCATELLID.^, 



FRESH-WATER NERITID^E, HELICLMD^. 



Bt 



W. G. BINNEY. 



WASHINGTON: 

 iMITHSONIAN INSTITUTION". 



SEPTEMBER, 1S65. 



