GONIOBASIS. 333 



both these specimens there are two raised cord-like striae above and 

 a few impressed striae at the base. — Lea. 



246. G. elliptic a, Lea. 



Melanin elliptica, Lea, Proc. Acad. Nat. Sci., p. 118, 1861. 



Goniobasis elliptica, LEA, Jour. Acad. Nat. Sci., v, pt. S, p. 225, t. 34, f. 13, March, 

 18G3. Obs., ix, p.47. 



Description. — Shell smooth, elliptical, yellowish, four-banded ; spire 

 short, obtuse, folded at the tip ; sutures impressed ; whorls six, sub- 

 convex ; apei-ture rather large, elongate elliptical, four-banded within ; 

 obtusely angular at the base ; outer lip acute ; columella whitish and 

 incurved. 



Operculum narrow, elliptical, spiral, light brown, with the polar 

 point near the inner margin above the base. 



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

 Foreman, M.D. 



Diameter, •41 ; length, -78 of an inch. 



Observations. — This is a remarkably regular elliptical species, pointed 

 at the base and apex. There are five specimens before me. pig. 639. 

 One is an old worn one, which I long since received among 

 other species from Dr. Foreman. It looks much like the 

 young or immature of Melania ovalis (nobis), but is not so 

 thick, nor has it striae. It has somewhat the aspect of Litha- 

 sia Sliowalterii (nobis), but it has not the callus of that 

 genus, and it is not compressed at the sides, but is regularly convex. 

 All the specimens under examination have four regular bands, and 

 one of them is disposed to be striate. The folds on the upper whoi'ls 

 are represented below by irregularities on the whorls which interrupt 

 the upper band and give it a maculate appearance. — Lea. 



247. Gr. bullula, Lea. 



Melania hullula, Lea, Proc. Acad. Nat. Sci., p. 121, 1861. 



Goniobasis bullula, LEA, Jour, Acad. Nat. Sci., v, pt. 3, p. 221, March, 1863. Obs,, 

 ix, p.43, t.34, f. 5. 



Desci'iption. — Shell smooth, conical, inflated, rather thin, greenish- 

 yellow, four-banded; spire raised; sutures impressed; whorls about 

 five, inflated, the last rather large; aperture rather large, widely 

 ovate, whitish and banded within; outer lip acute ; columella whitish, 

 thickened above, sinuous, subangular below. 



