NEW MELANID7R OF THE UNITED STATES, 329 



Shell folded, striate or granulate, fusiform, rather thick, inflated, yellowish olive, 

 banded ; spire obtusely conical, sutures impressed ; whorls five, slightly convex ; ap- 

 erture very large, ovately rhomboidal, banded within ; outer lip sharp, scarcely sin- 

 uous ; columella thickened, slightly twisted. 



Operculum ovate, thin, brown, with the polar point well removed from the left mar- 

 gin and the base. 



Proc. Acad. Nat, Sci., 1862, p. 269. 

 Hah.— Valley River, Cherokee City, N. C, Prof. David Christy. 

 My cabinet and cabinets of Prof. Christy, J. Clark. Dr. Hartman and Dr. Lewis. 

 Diam - ' 37 > Length -67 inch. 



Remarks.— I have about a dozen of this species from Mr. Clark, collected by Prof. 

 Christy in North Carolina. All the specimens are nearly of the same size and out- 

 line, and have the same bands, usually four, but they differ much in the exterior. 

 Some have no stria?, but those which have cut the irregular folds and form granules. 

 Usually, there are four bands indistinct on the outside, but well marked within, the 

 two middle ones being approximate. The upper band is the largest, and the callus 

 above is often purple. Some specimens have five or six bands. It reminds one of Melania 

 (Goniahasis) basalis (nobis), but that shell is not so much inflated, nor has its folds, 

 stria? or granules like this. The aperture is more than half the length of the shell. 

 I name this after Prof. David Christy, who collected it, with many interesting shells, 

 while in the north-western part of North Carolina. 



GONIOBASIS INSTABILIS. PI. 38, fig. 186. 

 Testa plicata vel laevi, fusiformi, crassa, subinflata, vittata vel evittatft, olivacea; spira conoidea; suturis 

 impressis; anfractibus instar quinis, convexiusculis ; apertura grandi, ovato-rhombordea, ictus vittata ; 

 labro aouto, vix sinuoso ; columella incrassata, parum incurva et contorta. 

 Shell folded or smooth, fusiform, thick, somewhat inflated, banded or not banded, 

 olivaceous ; spire conical ; sutures impressed ; whorls about five, slightly convex ; aper- 

 ture large, ovately rhomboidal, banded within ; outer lip acute, scarcely sinuous ; col- 

 umella thickened, somewhat bent in and twisted. 



Operculum ovate, thin, light brown, with the polar point well removed from the left 

 margin and the base. 



Proc, Acad. Nat. Sci., 1862, p. 269. 

 floi.— Twenty-one miles north of Murphy, and other places in Cherokee County, 

 Georgia, Prof. David Christy. 



My cabinet and cabinets of Prof. Christy, J. Clark and Dr. Hartman. 



Diam - ,32 ' Length -64 inch. 



Remarlcs.—I have a number of these from several habitats in Cherokee County. 

 North Carolina. From the different habitats there is a great variety of character, about 

 half seem to be plicate, the others perfectly smooth; the folds not being on the upper 

 whorls, but commencing on the body whorls or the penultimate, and these folds are 



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