NEW FRESH WATER AND LAND SHELLS. 185 



Remarks. — I received a single specimen only of this species. It seems to be 

 distinct in its large carina which extends over all the whorls, but it is scarcely- 

 distinct on the last. The columella is remarkably indented. The aperture 

 is nearly one-half the length of the shell. 



Melania Warderiana. Plate 6, Fig. 47. 



Testa carinatd, clavaformi, subcrassd, tenebrosa; spird conicd; suturis linearibus; anfractibus octonis, 

 convexis; aperturd ovata, subgrandi, intus earned. 



Shell carinate, club-shaped, rather thick, very dark; spire conical; sutures linear; whorls eight, convex; 

 aperture ovate, rather large, within flesh-colour. 



Hab. Cedar Creek, a branch of Clinch Hiver, Russell County. Virginia. 

 J. A. Warder, M. D. 



My Cabinet, and Cabinets of Dr. Warder, and T. G. Lea. 

 Diam. .37, Length .76 of an inch. 



Remarks. — ^I have two specimens before me. The two lowest whorls are 

 smooth. The superior ones are carinate, with a small intermediate stria. 

 The upper whorls diminish very rapidly. The exterior of the shell is nearly 

 black and shining, and its colour appears to arise from a deposite of ferruginous 

 matter, as the substance of the shell is reddish. The aperture is rather more 

 than one-third the length of the shell. I name it after Dr. Warder of Cin- 

 cinnati, to whom I owe the possession of this and other interesting specimens. 



Section IV. — Sulcate Melanije. 

 Melania sulcosa. Plate 6, Fig. 48. 



Testa transverse sulcatd, conoided, crassd, luteold; suturis impressis; anfractibus planulatis; aper- 

 tura parva, ovata, albida. 



Shell transversely sulcate, conical, thick, yellowish; sutures impressed; whorls flattened; aperture small, 

 ovate, whitish. 



Hab. Tenn. Dr. Troost. 



My Cabinet,^ and Cabinet of Dr. Troost. 

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



