NEW MELANIDiE OF THE UNITED STATES. 251 



Hob. — Coosa River, Alabama, E. R. Showalter, M. D. 



My cabinet and cabinets of Dr. Spillman and Dr. Showalter. 

 Diam. -48, Length -92 inch. 



Remarhs. — I have a number of specimens chiefly young, from Dr. Spillman, and a fine 

 suite of different ages from Dr. Showalter. There is much difference among them, 

 some being subcylindrical, while others are disposed to be oval. This species is nearly 

 allied to Wetumphaensis (nobis) and closely resembles it in the adult state, but in the 

 young state the two species differ very much. The young of Wetumphaensis is re- 

 markably carinate on the middle of the whorl, and this is more marked on the supe- 

 rior whorls, the epidermis being of a light yellowish horn-color, with a distinct brown 

 band on the upper portion of the whorl, and generally two below, sometimes 

 three.. The Spilhnanii has a very obtuse angle along the middle of the whorl, which 

 does not show in the upper whorls, which are dark brown, and the band is inter- 

 rupted, making the spire somewhat maculate. The aperture is not quite half of 

 the length of the shell. The hem is not well defined. I name this after my friend 

 Dr. Spillman, who sent me a number of fine specimens, old and young. 



Schizostoma Wetumpkaense. PI. 35, fig. 56. 



Testa striata, ovato-cylindracea, crassa, pallido-fusca, perforata ; spira obtusa, conoidea ; suturis valde 

 iinpressis ; anfractibus senis, vittatis, planulatis, ultimo grandi ; fissura obliqua brevique ; apcrtura 

 grandi, ovata, intus vittata, ad basini obtuse angulata ; columella alba, superne incrassata ; labro 

 acuto, sinuato. 



Shell striate, ovately cylindrical, thick, light brown, umbilicate ; spire obtuse, conoi- 

 dal ; sutures very much impressed ; whorls six, banded, flattened, the last large ; fissure 

 oblique and short ; aperture large, ovate, banded within, at the base obtusely angular; 

 columella white, thickened above ; outer lip sharp and sinuous. 



Ojaerculwm spiral, large and longj the polar point being near to the lower left 

 edge. 



Schizostoma Wetumpkaense, Proc. Acad. Nat. Sci., 1860, p. 187. 



Hab. — Coosa River, at Wetumpka. Alabama, E. R. Showalter, M. D. 



My cabinet and cabinet of Dr. Showalter. 

 Diam. -44, Length -70 inch. 



Remarhs. — Among the specimens from Dr. Showalter were a number of adults and 

 young of this species. Some were eroded so much as to exhibit little more than the 

 body whorl. The more perfect ones still slightly eroded at the apex exhibited six 

 whorls. The half-grown have five whorls, with a cord-like carina on the middle of 

 each, and this carina is raised much above the surface. The quite young have 

 a sharp apex, and carry the carina to near the apex. The suite, which I owe to the 

 kindness of Dr. S., consists of some eighteen specimens, varying from one-fourth to 



