66 



BIBLIOGRAPHY OF 



Name. 

 Paludina integra Sat/. 

 ponderosa Say. 

 genicula Conr. 

 Anculosa littorina Bald. 

 Cerithium (Potamis) Californi- 



cum Haiti. California. 



Cyclas elevata Hold. New Orleans. 



Genus Discus (Planorbia armlgerus). 



Locality. 

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

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

 Flint river, Ga. 

 Holston river, Va. 



No. II — January, 1841. 



23 

 24 



26 

 28 

 31 



3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 

 3 



vu 

 vii 



vm 



ix 



Fla., Ala., Ind., Mo., 



Mich., Cuba. 

 Hopeton, Ga. 

 Florida. 



17 vi Paludina vivipara Lin. 



P. lineata Val. 

 1-2 Georgiana Lea. 



3,4 Bengalensis Lam. 



P. fasciata Bowd. 

 elongata Swains. 

 tmdtilineata Say. 

 carinata Val. 

 subpurpurea Say. 

 x 1-6 intertexta Say. 



P. transversa Say. 

 of cover Melania rufula Raid. 

 " Physa fontana Hold. 



" Ancylus parallelus LTald. 



" Subgenus Angitrema (Ex. Melania armigera Say.) 



" Melania costifera Hold. Illinois. 



" Ihlix dissimilis Wood = Pal. decisa. 



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



" Helix decisa Wood = Pal. subcarinata. 



" Pal. subcarinata. Tennessee. 



Mexico. 



Wabasb, S. Louis, Wis. 



New Orleans; S. C. 



Lake Pepin. 



Pennsylvania. 



Vermont. 



10 ii 

 10 



No. III.— July, 1841. 



Subgenera of LIMNEA. 

 Limnea Lam. 

 Radix Mont. 

 Laptolimnea Swainson. 

 Bulimnea Ila/d. 

 Acella Hald. 



Limnea catascopium Say. 

 L. pinyuis Say f 

 cornea Val. 

 Virginiana Lam. ? 

 emarginata Say. 

 serrata Hald. (n. sp. ?) 



Mass., N. York, N. W. 

 Terr., Canada, Dela- 

 ware and Schuylkill 

 rivers, Oregon. 



N. W. Terr., Maine. 



