GONIOBASIS. 257 



152. G. Louisvillensis, Lea. 



Goniobasls Louisvillensis, Lea, Proc. Acad. Nat. Sci., May, 1803. Obs., xi, p. S9, 

 t. 23, f. 3G. 



Description. — Shell smooth, fusiform, dark horn-color, without 

 bauds ; spire short ; sutures irregularly impressed ; whorls about five, 

 somewhat convex ; aperture rather large, long elliptical, white within ; 

 outer lip acute, slightly sinuous ; columella Avhite, thickened above 

 and twisted. 



Operculum ovate, reddish-brown, rather thin, with the polar point 

 on the left, near the base. 



Habitat.— ^aXls of the Ohio at Louisville, Ivy. ; W. H. DeCamp, M.D. 



Diameter, -25 ; length, -50 of an inch. 



Observations. — Two specimens only were received, neither perfect 



at the apex. It is a simple species with an unusually thick- 

 Fig. 496c. 

 ened columella, approaching indeed to Lithasia. It is near to 



Spartanbergensis and ovoidea (nobis) and is somewhat like 

 dej'iygis, Say, but cannot be confounded with this last species, 

 fi'om the same habitat, being much shorter in the spire, and 

 having a differently formed aperture. Neither of the two specimens 

 has any appearance of bands, but they may exist on other speci- 

 mens. The aperture is about one-half the length of the shell. — Lea. 



H. Smooth, elevated species. 



153. G. pulchella, Anthony. 



Melania pulchella. Axthoxy. Bost. Proc, iii, p. 301, Dec, 1850. IIiggins, Cat., p. 7. 

 Rkevk, Monog. Mehiiiia, sp. 2J7. Bixxey, Check List, No. 221. Brot, List, 

 p. 38. CuKKiEK, Shells of Grand River Valley, Mich. 



Description. — Shell small, thin, elongately conical, brownish horn, 



banded with brown ; spii-e conical ; whorls 7-8, convex ; aper- 

 Fig. 497. 



ture large, equalling one-third the length of the shell, elon- 

 gately ovate. 



Habitat. ? 



Longitude, seven-tenths ; latitude, one-fourth poll. 

 Observations. — A pretty species, ornamented by dark, rather 

 broad bands, somewhat like M. Taitiana and some varieties of M. Vir- 

 [inica. — Anthony. 



L. F. M-. S. IV. 17 



