NEW MELANIDvE OF THE UNITED STATES. 223 



Remarks. — This is a modest little species, with regular, even whorls. One of 

 the specimens has obscure bands, the other has none. It is allied to cequa, herein 

 described. The aperture is not quite half the length of the shell. 



Goniobasis Cahawbensis. PL 34, fig. 8. 



Testa lsevi, subrusiformi, olevato-conica, mucronata, subtenui, tencbroso-cornea, obsolete vittata; spira 

 subelevata ; suturis linearibus ; anfractibus octonis, superne planulatis, ultimo subgrandi ; aper- 

 tura parviuscula, ovata. intus albida vel luteola ; labro acuto ; columella arcuata, ad basim 

 subrotunda. 



Shell smooth, somewhat fusiform, raised conical, pointed, rather thin, dark 

 horn color, obtusely banded; spire somewhat raised; sutures line-like; whorls 

 eight, flattened above, the last rather large ; aperture rather small, ovate, whitish 

 or yellowish within ; outer lip acute ; columella arcuate, somewhat rounded at 

 the base. 



Melania Cahawbensis, Proc. Acad. Nat. Sci., 1861, p. 121. 



Hab. — ■Cahawba River, Alabama, E. R. Showalter, M. D. 



My cabinet and cabinet of Dr. Showalter. 

 Diam. -42, Length -84 inch. 



BemarJcs. — This is a regularly formed, graceful species, with very obscure bands. 

 In three of the specimens these bands are scarcely noticeable, but the fourth, 

 which is the youngest has three bands well defined within the aperture. It is 

 nearly allied to Melania germana, Anth., but it is more elongate and has not 

 the carination of the middle of the whorl, nor the rhomboidal aperture. The 

 aperture is more than one-third the length of the shell. The apicial whorls are 

 carinate. 



Goniobasis virgulata. PI. 34, fig. 9. 



Testa lsevi. fusiformi, conica crassiuscula, nitida, luteola, quadrivittata ; spira, conica, mucronata ; 

 suturis subimpressis ; anfractibus septenis, superne constricts,, ultimo bulboso ; apertura sub- 

 grandi, subelliptica, intus Iuteo-albS, et valde vittata ; labro aeuto ; columella inflecta ad basim 

 angulata et canaliculata. 



Shell smooth, fusiform, conical, somewhat thick, shining, yellowish, four-banded ; 

 spire conical, sharp-pointed; sutures impressed; whorls seven, constricted above, 

 the last bulbose ; aperture rather large, somewhat elliptical, yellowish white and 

 very much banded within ; outer lip sharp ; columella inflected, angular at the 

 base and canaliculate. 



Operculum ovate, spiral, dark brown, with the polar point on the inner side 

 near the base. 



Melania virgulata, Proc. Acad. Nat. Sci., 1S61, p. 119. 



Hab. — Coosa and Tallapoosa Rivers. Alabama, E. R. Showalter, M. D. 



