250 



BIBLIOGRAPHY OF 



[part II. 



Pa. 



PI. 



Fi 



s- 



Name. 



Locality. 



104 









Helizs alternata Say. 



Helicella alternata Fer. 

 Helix radiata Gmel. 

 scabra Lam. 



North. America. 



106 









Richardii Fei: 



Helicella Richardii Fer. 



North America. 



115 









tridentata Say. 



Helicodonta tridentata Say. 



United States. 



139 



xiii 



3- 



-4 



Bulimus dealbatus Say. 



Mexico. 



159 



xvi 



1- 



-2 



Pupa armigera Say. 



Pittsburg. 



190 



xix 



17, 



18 



Clausilia exesa Spix. 



CocJdodina exesa Rang. 

 Pupa exesa Wagn. 



Mexico, &c. 



207 



xxi 



1- 



-3 



Planorbis bicarinatus Say. 



United States. 



213 



xxi 



13- 



-15 



proboscideus Mice. 



Ohio. 



216 



xxii 



3, 



4 



Limnaea catascopium Say. 

 L. cornea Val. 



Delaware river. 



216 



xxii 



5- 



-6 



columella Say. 

 L. navicula Val. 



Philadelphia. 



224 



xxii 



15- 



-16 



Physa heterostropha Say. 



North America. 



232 



xxiii 



17- 



-18 



Helicina zephyrina Duclos. 

 H. variabilis in coll. 



Mexico. 



247 



XXV 



13, 



14 



Paludina decisa Say. 



Delaware river. 



248 



XXV 



15, 



16 



dissimilis Say. 



Delaware river. 



249 



XXV 



17- 



-18 



bicarinata Pot. et Mich. 



Delaware river. 



265 



xxvii 



23- 



-24 



Melania Virginica Say. 



Schuylkill. 



277 



xxvii: 



i 5, 



6 



Littorina irrorata Say. 

 Turbo irroratus Say. 



Philadelphia. 



472 









Oliva zonalis Lam. 



Mexico. 



476 









Cypraea arabicula Lam. 



Mexico. 



485 









radiaus Lam. 



Mexico. 



Vol 



. ii. 1844. 









125 









Mytilus crenatus Lam. 



Carolina ? 



135 









Modiola Papuana Lam. 



Mytilus Papuanus Lam. 



North America. 



148 



Ivi 



2 





Unio alatus Say. 



Megaptera megaptera Raf. 



Lake Champlain, 

 [&c, 



149 Ivii 1, 2 



149 

 150 



Ivii 

 Iviii 



3,4 

 1,2 



Symphynota alata Lea. 

 torsus Lea. 



U. retusa Lam. 

 rectus Layn. 

 ellipsis Lea. 



U. olivarius Raf. 



Diplasma vitrea Raf. ? 



Kentucky. 



North America. 

 North America. 



