68 



BIBLIOGRAPHY OP 



Pa. PI. Fig. 



Name. 



Locality. 



10 iii 



Paludina Integra Say. . 



S. C.,0.,Miss. r. in la. 



13 iv 



ponderosa Say. 



0.,Ind.,Ill.,Tenn.,Ala. 



15 V 



genicula Conr. 



Flint river, Ga. 



4 of cover 



Anculosa littorina Hold. 



Holston river, Va. 



4 



Cerithium (Potamis) Californl- 







cum Hald. 



California. 



4 



Cyclas elevata EaJd. 



New Orleans. 



Genus Discus (Planorbis armigerus). 



17 



23 

 24 



26 

 28 

 31 



3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 



No. II. — January, 1841. 



Paludina vivipara Lin. Fla., Ala., Ind., Mo., 



P. lineata Val. Mich., Cuba. 



1-2 Georgiana Lea. Hopeton, Ga. 



3, 4 Bengalensis Lam. Florida. 



P. fasciata Bowd. 

 elongata Swains. 

 multilineata Say. 

 carinata Val. 

 subpurpurea Say. 

 1-6 intertexta Say. 



P. transversa Say. 

 of cover Melania rufula Hald. 

 " Physa fontana Hald. 



" Ancylus parallelus Hald. 



" Subgenus Angitrema (Ex. Melania armigera Say.") 



" Melania costifera Hald. Illinois. 



" Helix dissimilis Wood== Pal. decisa. 



" Pal. decisa. N. Y., Va., N. C. 



" Helix decisa "Wood = Pal. subcarinata. 



" Pal. subcarinata. Tennessee. 



vn 

 vii 



vui 

 ix 



X 



Mexico. 



Wabash, S. Louis, Wis. 



New Orleans; S. C. 



Lake Pepin. 



Pennsylvania. 



Vermont. 



No. III.— July, 1841. 



Subgenera of LIMNEA. 

 5 Limnea Lam. 



5 Radix Mont. 



6 Laptolimnea Swainson. 

 6 Bulimnea Hald. 



6 . Acella. Hald. 



6 i Limnea catascopium Say. 



L. pinguis Say ? 

 cornea Val. 

 Virginiana Lam. ? 

 10 ii emarginata Say. 



10 serrata Hald. (n. sp. ?) 



Mass., N. York, N. W. 

 Terr., Canada, Dela- 

 ware and Schuylkill 

 rivers, Oregon. 



N. W. Terr., Maine. 



