266 NEW MELANIDiE OF THE UNITED STATES. 



Shell smooth, cylindrical, rather thin, yellowish horn-color, trebly banded ; spire 

 very obtuse, short; sutures irregularly impressed; whorls five, slightly convex 

 above, the last one constricted ; aperture rather large, squarish, whitish and much 

 banded within ; outer lip acute ; columella sinuous, white at the base, thickened and 

 channelled backward. 



Strephobasis Clarlcii, Proc. Acad. Nat. Sci., 1861, p. 96. 



Hah. — Tennessee River, at Chattanooga, Tennessee, Joseph Clark. 



My cabinet. 

 Diam. -38, Length -72 inch. 



Remarks. — Several specimens of this shell were long since sent to me by my 

 deceased friend, Mr. Clark, and it is with peculiar pleasure that I dedicate it to him, 

 who, during a long life, devoted his best energies to the investigation of the fauna and 

 flora of Ohio, and other western States. This species differs from the two others herein 

 described, in being more regularly cylindrical ; in being shorter and in having three 

 regularly revolving brown bands, one of which only is observable on the upper 

 whorls. The aperture is more than one half the length of the shell. There is a 

 thickening in the interior of the upper part of the whorls, which in some specimens is 

 irregular and oblique, and is observable from the outside. It gives a yellowish appear- 

 ance to this part of the whorl under the suture. 



A small shell which I described in the Trans. Am. Phil. Soc, New Series, v. 10, 

 p. 86, under the name of Melania pumila, from Tuscaloosa, I think will be found to 

 belong to this genus. I have never seen but the one specimen, and it does not 

 seem to me to be entirely mature. 



Strephobasis solida. PI. 35, fig. 77. 



Testa laevi, subcylindracea, crassa, solida, tenebroso-cornea vel oliva; spira. obtuso-conica ; suturis ini- 

 pressis ; anfractibus convexiusculis, ultimo subconstricto ; apertura subgrandi, subquadrata, intus 

 albida ; labro acuto, valde sinuoso; columella sinuosa, inferne incrassata et retro-canaliculata. 

 Shell smooth, subcylindrical, thick, solid, dark horn-color or olive ; spire obtusely 

 conical ; sutures impressed ; whorls slightly convex, the last slightly constricted ; 

 aperture rather large, nearly quadrate, whitish within ; outer lip acute, very sinuous 

 columella sinuous, thickened below and channelled backwards. 



Operculum subovate, very dark brown, with the polar point near the middle of the 



base. 



Melania solida (nobis), Trans. Am. Phil. Soc., v. 10, pi. 9, fig. 27. 



Hah. — Tennessee, E. Foreman, M. D. ; East Tennessee, President Estabrook ; Pu- 

 lasky Creek, Kentucky, Joseph Lesley. 



My cabinet and cabinets of Dr. Foreman and President Estabrook. 

 Diam. -50, Length 1 inch. 



Remarks. — I described and figured an imperfect specimen of this species in the 

 Trans. Am. Phil. Soc, May 2d, 1S45, under the name of Melania sulida. The figure 



