. . NEW MELANIDiE OF THE UNITED STATES. 241 



Shell substriate, conical, somewhat thick, sooty brown ; spire somewhat raised ; 

 sutures irregularly impressed ; whorls six, somewhat convex ; aperture ovately rhom- 

 bic, whitish within ; .outer lip acute ; columella inflected, slightly thickened above, 

 obtusely angular at the base. 



Melania crepera, Proc. Acad. Nat. Sci. 1861, p. 123. 



Ifa&.— Yellowleaf Creek, Shelby County, Alabama, E. R. Showalter, M. D. 



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

 Diam. -41, Length -83 inch. 



Remarks. — This species is closely allied to Haysiana (nobis) , but is less striate, has 

 a darker epidermis, is rather smaller and not so solid. Some of the specimens have 

 but few and obscure striae on the lower part of the whorls, while others have them 

 over the whole whorl. None were perfect enough to show the character of the 

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

 shell. 



GONIOBASIS GRATIOSA. PI. 35, fig. 43. 



Testa tuberculata, aliquaudo striata, obtuso-iusiformi, crassiuscula, luteo-viridi, vol vittata. vel evittata ; 

 spira valde obtusa ■ suturis inrpressis ; anfractibus senis, superne planulatis, ultimo grandi ; aper- 

 tura subgrandi, subrhomboidea, intus albida ; labro acuto, subsinuoso ; columella inflecta, incrassata, 

 ad basim subangulata. 



Shell tuberculate, sometimes striate, obtusely fusiform, somewhat thick, yellowish 

 green, banded or without bands ; spire very obtuse ; sutures impressed ; whorls six, 

 flattened above, the last large ; aperture rather large, subrhomboidal, whitish within ; 

 outer lip acute, slightly sinuous ; columella inflected, thickened, subangular at 

 the base. 



Operculum ovate, spiral, dark brown, with the polar point near to the base. 

 Melania gratiosa, Proc. Acad. Nat. Sci., 1861, p. 122. 



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



My cabinet and cabinet of Dr. Showalter. 

 Diam. -39, Length -78 inch. 



Remarks. — This is a very remarkable and beautiful little species. There are three 

 specimens before me, all of them having four somewhat distant, low, obtuse, rather large 

 nodes. I have never seen any other species with this kind of nodes. The texture 

 of the shell is delicate, the epidermis smooth and shining. Two of the specimens 

 have four well-defined, brown bands, which are strongly marked inside and out. 

 The third specimen is without bands, but it is covered with very remarkable trans- 

 verse stria?, which traverse the nodes as well as the other parts of the surface. The 

 aperture is more than half the length of the shell. 



62 



