NEW FRESH WATER AND LAND SHELLS, 169 



Shell smooth, subfusiform, somewhat solid, horn-coloured; spire acute; sutures impressed; whorls some- 

 what convex ; aperture somewhat elongated, within purple. 



Hab. Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .32, Length .82 of an inch. 



Remarks. — This species has a strong resemblance to M. simplex, Say. It is 

 however more elevated in the spire. It is purplish within, but white towards 

 the margin of the lip. 



Melania Ocoeensis. Plate 5., Fig. 13. 



Testa IcRvi, conoided, subcrassd, tenebroso-corned; spird obtusd, apud apicem-lineis notatd ; suturis 

 impressis ; anfractihus subconvexis ; aperturd parvd, ovatd, cceruled. 



Shell smooth, conical, somewhat thick, dark horn-coloured; spire obtuse, toward the apex lined ; sutures 

 impressed; whorls somewhat convex: aperture small, ovate, bluish. 



Hab. Ocoee District, Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .32, Length .92 of an inch. 



Remarks. — Five specimens are before me, all of which are more or less decol- 

 late. None of them have bands. Oblique, irregular strias may be observed 

 more or less on all those which I have examined. 



Melania subcylindracea. Plate 5., Fig. 14. 



Testd IcBvi, subcylindracea, subcrassd, corned; spird obtuso-elevatd; suturis impressis; anfractihus 

 convexis; aperturd parvd, ovatd, albidd. 



Shell smooth, sub-cylindrical, somewhat thick, horn-colour; spire obtusely elevated; sutures impressed; 

 whorls convex; aperture small, ovate, whitish. 



Hab. Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .32, Length .85 of an inch. 



Remarks.— Thi^ is a club-shaped species with an aperture about the third of 

 the length of shell. All the specimens sent by Dr. Troost are more or less 

 decollate. 



