170 DESCRIPTION OF 



Melania sordida. Plate 5., Fig. 15. 



Testa leevi, conoided, subcrassd, tenebroso-corned ; suturis impressis; anfractihus subconvexis ; aper- 

 turd subgrandi, subrotundd, intus cceruled. 



Shell smooth, conical, somewhat thick, dark horn-coloured; sutures impressed; whorls somewhat con- 

 vex; aperture rather large, somewhat rounded, within bluish. 



Hab. Tennessee. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .40, Length 1.02 of an inch. 



Remarks. — The whole of five individuals before me have the apex decollate. 

 This species closely resembles the Ocoeensis herein described. It is, however, 

 larger in the aperture, which is more rotund, and the species seems to be larger. 



Melania regularis. Plate 5., Fiff. 16. 



Testa Icevi, conoided, subcrassd, tenebroso-corned ; spird elevatd; suturis subimpressis ; anfractibus 

 planulatis; aperturd parvd, albidd. 



Shell smooth, conical, rather thick, dark horn-coloured; spire elevated: sutures somewhat impressed ; 

 whorls flat ; aperture small, whitish. 



Hab. Oconee District, Tenn. Dr. Troost. 



My Cabinet, and Cabinet of Dr. Troost. 

 Diam. .40, Length 1.22 of an inch. 



Remarks. — This species has a regularly increasing and elevated spire. Nei- 

 ther of the three before me have perfect tips. The number of whorls must be 

 about ten. The aperture is about one-fourth the length of the shell. 



Melania fuliginosa. Plate 5., Fig. 17. 



Testd IcBvi, fusiformi, subinjlatd, subcrassd, tenebroso-fuscd; spird obtusd; suturis impressis; anfrac- 

 tibus senis, subconvexis; aperturd magnd, ad basim angulatd et canaliculatd. 



Shell smooth, fusiform, somewhat inflated, rather thick, dark brown; spire obtuse; sutures impressed; 

 whorls six, somewhat convex; aperture large, at the base angular and channeled. 



