GONIOBASIS. 175 



41. G. mediocris, Lea. 



Goniobasis mediocris, Lea, Proceed. Acad. Nat. Sci., p. 2G9, 1862. Jour, Aaad. 

 Nat. Sci., V, pt. 3, p. 32G. t. 38, f. 179, March, 18G3. Obs., ix, p. 148. 



Description. — Shell folded, subfusiform, rather thin, ash-color, shin- 

 ing, banded ; spire conical ; sutures irregularly impressed ; whorls 

 six, flattened ; aperture somewhat large, rhomboidal, whitish and 

 banded within: outer lip sinuous: columella bent in, thick- 

 ened and twisted. 



Habitat. — Tennessee; Dr. Edgar, and President Lindsley. 



Diameter, -23 ; length, -57 of an inch. 



Observations. — A single specimen Avas among a number of 

 shells simply labelled, "Tennessee." This is a well charac- 

 terized little species, which cannot be confounded with any I know. 

 It has two obscure bands, one of which shows on the whorls of 

 the spire, which is covered with rather distant folds, which cui've 

 to the right. The spire, embellished with folds and a colored band, 

 reminds one of some of the small Mitrce. The aperture is nearly 

 one-half the length of the shell. — Lea. 



42. G. Duttonii, Lea. 



Goniobasis Duttonii, Lea, Proceed. Acad. Nat. Sci., p. 26G, 1862. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 314, t. 37, f. 158, March, 18G3. Obs., ix, p. 13G. 



Description. — Shell folded, conoidal, pale reddish-yellow, thick, 

 double-banded ; spire conoidal ; sutures irregulai'ly impressed ; whorls 

 Fie 339 ^^'^out seven, somewhat convex; aperture ovatcly rhomboidal, 

 white and double-banded within; outer lip acute, sinuous; 

 columella bent in, thickened and very much twisted. 



Habitat. — Slaury County, Tennessee; T. R. Dutton : Gray- 

 son County, Kentucky; S. S. Lyon. 

 Diameter, -38; length, -80 of an inch. 

 Observations. — This is a well marked species, allied to Pyhasii, 

 herein described, and to Mdania {Goniobasis) laqueata, Say. It is a 

 stouter shell than cither, and may at once be distinguished from them 

 by its two well defined brown bands, the upper one of which is the 

 larger. The folds are rather indistinct, close, not curved, and in- 

 clining to the right. The specimen from Maury County, Tennessee, 



