298 NEW MELANIDiE OF THE UNITED STATES. 



more attenuate, having a higher spire and rather smaller aperture. The aperture is 

 about two-fifths the length of the shell. 



GONIOBASIS SPINELLA. PI. 37, fig. 130. 



Testa lasvi, valde attcnuata, tenui, tenebroso-oliva, cvittata ; spira valde elevata, inucronata ; suturis 

 regulariter impressis ; anfractibus instar novenis, ■ planulatis ; apertura parvissima, ovata, intiis 

 albida ; labro acuto, paruni sinuoso ; columella inflecta et interne parum incrassata. 



Shell smooth, very much attenuate, thin, dark olive, without bands; spire very 

 much raised, sharp-pointed ; sutures regularly impressed ; whorls about nine, flat- 

 tened ; aperture very small, ovate, whitish within ; outer lip acute, slightly sinuous ; 

 columella bent in and slightly thickened below. 

 Proc. Acad. Nat. Sci. 1862, p. 264. 



Hah. — Sycamore, Claiborne County, Tennessee, J. Lewis, M. D. 



My cabinet. 

 Diam. -20> Length -67 inch. 



Remarks. — A single specimen only was received from Dr. Lewis. It is nearly of 

 the size of Melania (Goniohasis) terebralis (nobis), but is a slimmer and darker colored 

 species. It is very nearly of the same outline of Melania ( Goniohasis) strigosa (nobis), 

 but much smaller, slimmer and darker color. The specimen before me has neither 

 folds nor angle on the apicial whorls. Below the sutures there is a line of a lighter 

 green. The aperture is about one-fifth the length of the shell. 



GONIOBASIS ESTABROOKII. PI. 37, fig. 131. 



Testa lasvi, conica, subtcnui, rufo-cornea, cvittata; spira attenuato-conica, mucronata ; suturis' impressis; 

 anfractibus denis, convcxiusculis ; apertura parviuscula, ovata, intus albida ; labro acuto, parum 

 sinuoso ; columella inflecta. 



Shell smooth, conical, rather thin, reddish horn-color, without bands; spire attenu- 

 ately conical, sharp-pointed ; sutures impressed; whorls ten, somewhat convex ; ap- 

 erture rather small, ovate, whitish within ; outer lip acute, slightly sinuous ; colu- 

 mella bent in. 



Operculum ovate, light brown, with the polar point to the left of the centre, to- 

 wards the basal margin. 



Proc. Acad. Nat. Sci., 1862, p. 264. 



Hah. — Knoxville, Tennessee, President Estabrook. 



My cabinet. 

 Diam. -34, Length -89 inch. 



Remarks. — I received from President Estabrook, nine specimens of this species. 

 They were all covered with a black deposit of oxide of iron. This being removed, 

 the epidermis was found to be smooth and shining, and of a reddish horn-color, in- 



