OF CONCHOLOGY. 249 



7. N. CASTA,* Lea. 



L. casta, Lea. — Philos. Proc., vol. ii., p. 33. 1841. 



Am. Philos. Trans., vol. ix., p. 11. Observ., vol. iv., p. 11. 

 1844. 



Habitat. — Poland, Ohio, (Lea.) Georgia, (Coll. Tryon.) 



8. N. COARCTATA,* Lea. 



L. coardata, Lea. — Philos. Proc., vol. ii., p. 33. 1841. 

 Am. Philos. Trans., vol. ix., p. 11. Observ., vol. iv., p. 11. 

 1844. 



L. columella, Say, -(Part.) Haldeman. — Moaog. of Limniades, 

 Part v., p. 38. 1842. 



Habitat. — Newport, E. I., (Lea.) 



*** 



9. BULIMN^A MEGASOMA, Say. 



Limnsea megasoma, Say. — Narrative of Long's Expedition, 

 p. 263, t. 15, f. 10. 1824. 

 Binney's Edit., p. 129, t. 74, f. 10. 1858. 

 Haldeman, Monog. of Limniades, Part 3, p. 13, t. 3, f. 1, 



3. 1841. 

 C. B. Adams, Moll, of Middlebury, Vt. 1841. 



Am. Jour. Sci., vol. xl, p. 266. 1841. 

 Shells of Vermont, p. 3. 1842. 

 DeKay, Moll. N. Y., p. 69, t. 4, f. 67. 1843. 



Habitat. — North- West Territory, (Say.) Vermont, (Adams.) 

 Michigan, (Coll. Tryon.) Canada, (Bell.) 



10. LiMNOPHYSA REFLEXA, Say. 



L. reflexa, Say. — Jour. Acad. Nat. Sci., vol. ii., p. 167. 1821. 

 Am. Conch., t. 31, f. 2. 1832. 

 Binney's Edit., p. 65 and 188, t. 31, f. 2. 1858. 

 Chenu. Bibliotheque Conchy liologique, vol. iii., p. 44, t. 



7, f. 4. 

 Haldeman, Monog. Limniades, No. 4, p. 26, t. 8. 1842. 

 DeKay, Moll. N: Y., p. 71, t. 4, f. 65, 72. 



L. elonrjata^ Say. — Jour. Acad. Nat. Sci., vol. ii., p. 167. 

 1821. 

 Narrative of Long's Exped., p. 263. 1824. 

 Binney's Edit., p. 65 and 130. 1858. 



L. exilis, Lea. — Am. Philos. Trans., vol. v., p. 114, t. 19, f. 

 82. Observ., vol. i., p. 226. 1837. 



Habitat. — W. New York to Wisconsin. 



* Doubtfully distinct from columella. 



