248 AMERICAN JOURNAL 



Habitat. — Maine, (Mighels.) English Eiver, Canada. (Coll, 

 Trjon.) 



4. N. DECOLLATA, Mighels & Adams, 



L. decollata^ Mighels & Adams, Bost, Soc, Proceed,, vol, i., 



p. 49, 1841, 

 Bost. Jour. Nat. Hist., vol. iv., p. 45. t. 4, f. 18. 1842. 

 Mighels, Catalogue Shells of Maine, Bost. Jour. Nat. Hist., 



vol, iv,, p. 336. 1842. 



L. catascopium, Say, (Part.) Haldeman. — Monog. Limniades, 

 Part v., p. 62, t. 14. 1842. 



L. speciosa, DeKay.— Moll, N, Y., p, 67, 1843. 

 Halitat. — Maine, (Mighels,) 

 6, N. COLUMELLA, Say. 



L. columella, Say, — Jour. Acad. Nat. Sci., vol i., p. 14. 1817. 

 Ditto, vol, ii., p, 167, 1821, 

 Nicholson's Encyc, 3d edit., vol. iv. 1819. 

 Binney's Edition, p. 56, 65, 1858, 

 Potiez & Michaud, Galerie des MoUusques, p. 216, t. 22, 



f, 5, 6, 1838, 

 Gould, Invert, Mass., p, 215, f, 144, 1841. 

 Haldeman, Monog. Limniades, Part v., p. 38, t. 12, 1842. 

 DeKay, Moll. N. Y., p. 72, t. 4, f. 75. 1843, 



L. chalybea, Gould.* — Am. Jour. Sci., vol. xxxviii., p. 196. 



1840. 

 L. navicula, Yalenciennes. — Eecueil d'Observ. Zool., &c., 



ii., p. 251. 1833. 

 L. strigosa, Lea. — Philos. Proc, ii,, p. 33. 1841. 



Am. Philos. Trans., vol. ix., p. 12. Observ., vol. iv., p. 



12. 1844. 

 L. acuminata^ Adams. — Am. Jour. Sci., vol. xxxix., p. 374. 



1840. 

 Habitat. — Maine to South Carolina, and westward to Iowa. 

 Lake Winnipeg. 



6. N. MACKOSTOMA, Say. 



L. macrostoma^ Say. — Jour. Acad. Nat. Sci., vol. ii., p. 170. 

 1821. 

 Binney's Edit., p. 67. 1858. 

 Gould, Invert. Mass., p. 217, f. 148. 1841. 



L. columella, Say, (Part.) Haldeman. — Monog. Limniades, 



Part v., p. 38, t. 12, f. 1—5. 1842. 

 Habitat. — Massachusetts to Pennsylvania. 

 * A variety in " Invert. Mass.," p. 216, f. 145. 1841. 



