GONIOBASIS. 189 



color, without bands ; spire irregularly conical ; sutures impressed ; 

 Avhorls about seven, somewhat convex, with folds slightly bent ; aper- 

 ture rather small, ovately rhomboidal, bluish- white within; outer lip 

 acute, scarcely sinuous ; columella somewhat bent in and twisted. 



Operculum ovate, thin, light brown, with the polar point 

 well removed from the margin and towards the base. 



Habitat. — North Alabama; I'rof. Tuomey. 



My cabinet and cabinet of Dr. Hartman. 



Diameter, ••29 ; length, -79 of an inch. 



Observations. — I have eight specimens before me of this 

 modest little species. They were taken by Prof. Tuomey 

 during his geological survey of Alabama many years since. The 

 folds are not on the body -whorl; they incline to the left. It is allied 

 to Melania {Goniobasis') acuta (nobis), but is not so small nor so 

 pointed, and it is more of a horn-color. The aperture is about one- 

 third the length of the shell. — Lea, 



Goniobasis proletaria. — Shell folded, obtusely conical, rather thin, 



horn-color, without bands ; spire obtusely conical ; sutures impressed; 



whorls about six, slightly convex, folded above; aperture somewhat 



large, subrhomboidal, whitish within ; outer lip acute, sinu- 

 Fig. 370. " ' ) I' > 



ous ; columella bent in, thickened and twisted. 

 Habitat. — Florence, Alabama River; Rev. G. White. 

 Diameter, 'SI ; length, -65 of an inch. 



Observations. — A single specimen only was received, and 

 that far from being perfect. The epidermis of it is very thin 

 and most of it removed. It is nearly of the size and somewhat like 

 pattpercula, herein described, but is more conical and has larger and 

 more distant folds, which are very slightly inclined to the left. The 

 aperture is more than one-third the length of the shell. — Lea. 



Appears to be the young of continens. 



64. G. viridicata. Lea. 



Goniobasis viridicata. Lka, Pioc. Ac'ail. Kat. Sci., p. 268, ISfii. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 322, t. 38, f. 172, March, 18G3. Oba., ix, p. m. 



Description. — Shell folded, somewhat drawn out, thin, greenish, 

 without bands; spire conical, exsertcd; sutures impressed; whorls 

 about Bcyen, flattened, with rather close folds; aperture very small, 



