CHIEFLY OF THE UNITED STATES. 133 



Remarks. — A number of specimens were sent from both the above named habitats. 

 It is a graceful, well formed little species, with a pointed apex and dark brown, rather 

 shining epidermis. Usually there is a yellowish line below the suture, and some- 

 times this portion of the whorls is impressed. The aperture is almost universally 

 purple, more or less intense. It is in outline very like Melania (Gonioiasis) tene- 

 hrosa (nobis), but that species has carinre on the upper whorls which this never has. 

 Several specimens from Florence, Alabama, sent to me by Rev. G. "White, are nearly 

 of the same form, and I think may belong to this species. The aperture is about 

 eight-twentieths the length of the shell. 



GONIOBASIS LOUISVILLENSIS. PL 23, fig. 36. 



Testa Isevi, fusiformi, tenebroso-cornea, evittata ; spini curta ; suturls irregulariter impressis ; anfractibus 

 instar quinis, subconvexis ; apertura subgrandi, longo-elliptica, intus alba ; labro aouto, vix sinuoso ; 

 columella alba, superne incrassata, aliquanto contorta. 



Shell smooth, fusiform, dark horn-color, without bands; spire short; sutures 

 irregularly impressed ; whorls about five, somewhat convex; aperture rather large, 

 long-elliptical, white within; outer lip acute, slightly sinuous; columella white, 

 thickened above and somewhat twisted. 



Operculum ovate, reddish brown, rather thin, with the polar point on the left near 

 the base. 



Proc. Acad. Nat. Sci. 1863, p. 155. 



5a&.— Falls of the Ohio at Louisville, Ky., Wm. H. De Camp, M. D. 



My cabinet and cabinet of A. 0. Currier. 

 Diam. '25, Length -56 inch. 



Remarlcs. — Two specimens only were received from Mr. Currier, neither perfect at 

 the apex. It is a simple species, with an unusually thickened columella, approach- 

 ing indeed to Lithasia. It is near to Spartanhergemis and ovoidea, (nobis,) and is 

 somewhat like depygis, Say, but cannot be confounded with this last species, from 

 the same habitat, being much shorter in the spire and having a differently formed 

 aperture. Neither of the two specimens have any appearance of bands, but they 

 may exist on other specimens. The aperture is about one-half the length of the 

 shell. 



GONIOBASIS LITHASIOIDES. PI. 23, fig. 37. 



Testa laevi, subfusiformi, cornea, evittata; spira conoidea ; suturls impressis; anfractibus senls, subcon- 

 strictis, superne planulatis ; apertura grandiuscula, rhomboidea, intus albida; labro acute, parum 

 sinuoso; columella alba, inflecta, parum contorta. 



Shell smooth, subfusiform, horn-color, without bands ; spire conoidal ; sutures im- 



34 



