NEW MELANID^l OF THE UNITED STATES. 307 



Remarks. — A single specimen, of this gracefully formed species, was among a 



number of shells given to me by my friend, the late Prof. Vanuxem. The exact 



habitat was not given. It is a thin subdiaphanous species of an ashen gray, with a 



remarkably thin epidermis. There is an obscure appearance of a band towards the 



upper portion of the whorls and a purple oblique marking at the interior of the base 



of the axis. It is allied to Ohioemis herein described, but it is more slender, thinner, 



and has a more elongate aperture. The aperture is six-sixteenths the length of the 



shell. 



Goniobasis Vanuxemii. PI. 37, fig. 146. 



Testa lac vi, fusiformi, subcrassa, tenebroso-cornea ; spira obtuse conoidea ; suturis impresses ; anfractibus 

 septenis, subconvexis ; apertura magna, subrhoiuboidea, intus albida vel purpurea; labro acuto, 

 parum sinuoso ; columella incurva-, supcrnc et inferno incrassata. 



Shell smooth, fusiform, rather thick, horn-color ; spire obtusely conical ; sutures im- 

 pressed ; whorls seven, slightly convex ; aperture large, subrhomboidal, white or 

 purple within ; outer lip acute, slightly sinuous ; columella bent in, thickened above 

 and below. 



Operculum ovate, very thin, light-brown, with the polar point near to the base on 

 the left. 



Proc. Acad. Nat. Sci., 1862, p. 265. 



Bab. — North Fork of the Holston River, Virginia, Prof. L. Vanuxem. 



My cabinet and cabinet of Dr. Hartman. , 



Diam. -27, Length '54 inch. 



Remarlcs. — Many years before the decease of my lamented friend Prof. Vanuxem, 

 he gave me a number of mollusca collected during his journeys in South Carolina 

 and Western Virginia. Among them was cpaite a number of this little species which 

 I now dedicate to him. It is nearly allied to Melauia [Goniobasis) Niagcurensis 

 (nobis), but is a small species with a shorter spire, and is straighter at the base of the 

 columella. The aperture is rather more than one-third the length of the shell. 



Goniobasis Spartanburgensis. PI. 37, fig. 147. 



Testa lasvi, fusiformi, subtenui, virido-cornea, fulgida, vittata vel evittata; spira acute conica, ad apiceni 

 carinata ; suturis impressis ; anfractibus octonis, planulatis ; apertura submagna, elongato-rbom- 

 boidea, intus albida; labro acuto, vix sinuoso; columella parum incurva, inferue incrassata. 



Shell smooth, fusiform, rather thin, greenish horn-color, bright, banded or without 

 bands ; spire acutely conical, carinate at the apex ; sutures impressed ; whorls eight, 

 flattened, aperture rather large, elongately rhomboidal, white within; outer lip acute, 

 scarcely sinuous ; columella slightly bent in, thickened below. 



Operculum ovate, thin, brown, with the polar point near to the base on the left 



margin. 



Proc. Acad. Nat. Sci. 1S62. p. 26o 



