250 



BIBLIOGRAPHY OP 



[part II. 



Pa. PI. Fig. Name. Locality. 



104 • Helix alternata Sai/. North. America. 



Jlelicella alternata Fer. 

 Helix radiata Gmel. 

 scab7-a Lam. 

 Richardii Fer. North America. 



Helicel/a Richardii Fer. 

 tridentata Say. United States. 



Jlelicodoiita tridentata Say. 

 Bulimus dealbatus Sai/. Mexico. 



Pupa armigera Say. Pittsburg. 



Clausilia exesa Spix. Mexico, &c. 



Cochlodina exesa Rang. 

 Pupa exesa Wagn. 

 Planorbis bicarinatus Say. United States. 



proboscideus Mke. Ohio. 



Limncea catasc opium Say. Delaware river. 



L. cornea Val. 

 216 xxii 5-6 columella Say. Philadelphia. 



L. navicula Val. 

 Physa heterostropha Say. North America. 



Helicina zephyrina Duclos. Mexico. 



//. variabilis in coll. 

 Paludina decisa Say. Delaware river. 



dissimilis Say. Delaware river. 



bicarinata Pot. et Midi. Delaware river. 



Melania Virginica Say. Schuylkill. 



Littorina irrorata Say. Philadelphia. 



Turbo irroraius Say. 

 Oliva zonalis Lam. Mexico. 



Cypraea arabicula Lam. Mexico. 



radians Lam. Mexico. 



Mytilus crenatus Lam. Carolina ? 



135 Modiola Papuana La7n. North America. 



Alytihis Papuanus Lam. 



148 Ivi 2 Unio alatus Say. Lake Champlain, 



Megaptera mecjaptera Raf. [&c. 



Symphynota alala Lea. 



149 Ivii 1, 2 torsus Lea. Kentucky. 



U. retusa Lam. 

 149 Ivii 3, 4 rectus Lam. North America- 



ISO Iviii 1, 2 ellipsis Lea. North America. 



U. olivarius Raf. 



Diplasma vitrea Raf. ? 



