238 NEW MELANIDiE OF THE UNITED STATES. 



Shell rugosely striate, subfusiform, inflated, rather thick, greenish yellow, shining, 

 three-banded ; spire very obtuse ; sutures irregularly and very much impressed ; 

 whorls seven, carinate above ; aperture wide, subrhomboidal, whitish within and 

 banded ; outer lip acute ; columella incurved, pale rose-color, angular below. 

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



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



My cabinet and cabinet of Dr. Showalter. 

 Diam. - 42, Length '79 inch. 



Remarks. — A single specimen only was received from Dr. Showalter, and this may 

 not be entirely mature. It has six coarse transverse striae, which are rather sharp; 

 the two upper ones, being rather distant, cause quite a large furrow between them. 

 Other specimens may not present these characters, as stride, whether fine or coarse, 

 vary very much on the Melanidce. The color on the callus of the columella may also 

 vary in other individuals. The aperture is nearly half the length of the shell. This 

 species is allied to Vanuxemiana (nobis), but it has not so high a spire, and it is wider 

 in proportion. 



GONIOBASIS OEBICULA, PI. 34, fig. 37. 



Testa striata, globosa, subcrassa, luteo-virente, quadrivittata ; spira brevi, obtusa; suturis valde impressis; 

 anfractibus quinis, valde inflatis, ultimo grandi ; apertura grandi, elliptiea, iutus quadrivittata ; 

 labro acuto ; columella alba, incurvata, ad basim obtuse angulatfi,. 



Shell striate, globose, somewhat thick, yellowish green, four-banded ; spire short, 

 obtuse ; sutures very much impressed ; whorls five, very much inflated, the last 

 large ; aperture large, elliptical, four-banded within ; outer lip acute ; columella 

 white, incurved, obtusely angular at the base. 



Operculum ovate, dark brown, with the polar point near the inner border, one- 

 quarter above the base. 



Melania orbicula, Proc; Acad. Nat. Sci.. 1861, p. 118. 



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



My cabinet and cabinet of Dr. Showalter. 

 Diam. -31, Length -54 inch. 



Remarks. — This is a remarkably globose, small species, of which only a single 

 specimen was received. The strise are coarse and cord-like, and cover the whole of 

 the body whorl. It is so nearly like, in form and color, to Schizostoma globula (nobis) 

 that it might easily be taken for that shell, if it were not that there is no appearance 

 of a fissure. The length of the aperture is two-thirds the length of the shell. 



Goniobasis calculoides. PL 34, fig. 38. 



Testa striata, subglobosa, crassa, cornea, robusta ; spira obtuso-conica ; suturis impressis; anfractibus senis, 

 valde inflatis, ultimo grandi ; apertura subgrandi, elongato-elliptica, intus albida ; labro acuto ; colu- 

 mella albida, incrassata-, arcuata. ad basim retusi. 



