OF CONCHOLOGY. 24T 



CATALOGUE OF THE SPECIES OF LIMN^A 

 INHABITING THE UNITED STATES. 



BY GEORGE W. TRYON", JR. 



1. LlMN^A STAGNALIS, Linn. 



Helix stagnalis, Linngeus. — Faun. Suecica, 2188. 1761. 



L. jurjularis, Say. — Nicholson's Encjc, 1st edit. 1816. 

 Binney's Edition, p. 42. 1858. 



Haldeman, Monog. of Limniades, Part 8, p. 16, t. 4. 1841. 

 DeKay, Moll. N. Y., p. 74, t, 5, f. 81. 1843. 



L. appressa, Say.* — Jour, Acad. Nat. Sciences, ii., p. 168. 

 1821. 

 Binney's Edition, p. Q6. 1858. 

 Adams, Moll, of Middlebury, Yt. 1841. 



Am. Jour. Science, xl., p. 267. 1841. 

 Shells of Yermont, p. 3. 1842. 

 Haldeman, Monog. of Limniades, Part 4, p. 18, t. 5. 1842. 

 DeKay, Moll. N. Y., p. 74. 1843. 



L. speciosa, Ziegler. — Eossmassler, Iconog. Land & Siissw. 

 Moll, i., p. 96, t. 2, f. 50. 1835. 



Habitat. — Maine, Great Lakes, Canada, Minnesota, Wiscon- 

 sin, Oregon. Fort Simpson, British America, (Coll. Tryon.) 



2. L. LEPIDA, Gould. 



L. lepida, Gld. — Proc. Bost. Soc. Nat. Hist., vol. ii., p. 211. 

 1847. 

 Mollusca of Wilkes' Expl. Exped., p. 121, £ 141. 1852. 



Habitat. — Lake Yancouver, Oregon, (Gould.) 



3. Neristoma ampla, Mighels. 



L. ampla, Mighels. — Shells of Maine, Bost. Jour. Nat. Hist., 

 vol. iv., p. 337. 1842. 

 Ditto, vol. iv., p. 347. 1842. 

 Proc. Bost. Soc. Nat. Hist., vol. i., p. 129. 1843. 



* Half-grown shell. L. speciosa, Zglr., is the same. 



