326 LAND AND FKESH-WATER SHELLS OF N. A. [PAKT IV. 



Goniohasis copiosa. — Shell striate, broadly fusiform, ventricose, 

 obtusely conical, somewhat thick, yellowish horn-color, obscurely 

 banded ; spire very obtuse ; sutures irregularly impressed ; whorls five, 

 somewhat convex, the last very large; aperture very large, widely 

 Fig. 627. elliptical, whitish within ; outer lip acute, sinuous ; colu- 

 mella arcuate, slightly thickened above, rounded at the base. 

 Habitat. — Coosa River, Alabama j E. 11. Showalter, M.D. 

 Diameter, -42 ; length, -09 of an inch. 



Observations, — The single specimen before me seems to 

 be mature. It is allied to Melanin {Goniobasis) oralis (nobis) and 

 to c^lUa herein described. It is more inflated than either, and has a 

 more expanded outer lip. In this specimen the upper whorls have 

 a single well defined band, which is obsolete on the lowest whorl. It 

 has ten rather coarse, rounded striae, which are slightly interrupted 

 by the lines of growth, giving the surface a rugose appearance. 

 These stria3 being thickened, cause in the interior whitish lines. The 

 aperture is more than one-half the length of the shell. The apical 

 whorls are plicate. — Lea. 



Goniobasis orbicula. — Shell striate, globose, somewhat thick, yel- 

 lowish-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. 



Habitat. — Coosa River, Alabama; E. R. Showalter, M.D. 



Diameter, -31; length, -bi of an ihch. 



Observations. — This is a remarkably globose, small species, of 

 which only a single specimen was received. The striaj are 

 coarse and cord-like, and cover the whole of the body- 

 whorl. It is so nearly like in form and color to Schizostoma 

 glohula (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. — Lea, 



