GOXIOBASIS. 305 



lary bands. The rcddish-orown shining epidermis well characterizes 

 the species. The aperture is small, and is probably a little more 

 than the third of the length of the shell. — Lea. 



Very closely allied to pwdica, if not identical with that spe- 

 cies, 



207. G. pudica, Lea. 



Melanin pudica, Lea, Proc. Acad. Nat. Sci., v, pt. 3, p. 222, t. 34, f. 7, March, 1863. 

 Obs., ix. 



Description. — Shell smooth, conical, somewhat thick, olive or red- 

 dish; spii'e conical; sutures irregulai'ly impressed; whorls 



' o J I > Fig. 587. 



six, slightly convex ; aperture rather small, ovate, bluish- 

 white within ; outer lip acute ; columella inflected, thickened 

 above, rounded at the base. 



Observations. — This is a modest little species, with regular, 

 even whorls. One of the specimens has obscure bands, the 

 other has none. It is allied to ecqua, herein described. The aperture 

 is not quite half the length of the shell. — Lea. 



This species has been confounded with oUvula, Conrad ; it 

 is a smaller and more solid shell, and appears to be more 

 numerous in individuals. 



208. G. fabalis, Lea. 



Ooniobasis fabalis, Lka, Proc. Acad. Nat. Sci., p. 2GG, 1802. Joiir. Acad. Nat. Sci. 

 V, pt. 3, p. 311, t. 37, f. 151, March, 18G3. Obs., ix, p. 133. 



Description. — Shell smooth, elliptical, thick, yellow, four-banded; 

 spire very obtuse ; sutures irregularly impressed ; whorls four, some- 

 what convex above, the last one very large; aperture large, subrliom- 

 Fi". 5SS. boidal, whitish and banded within; outer lip acute, scarcely 

 sinuous ; columella tliickened above and below. 



Habitat. — Tennessee River; "\V. Spillman, M.D, 



Diameter, -Si ; lengtli, -Gi of an inch. 



Observations. — Among the Jldanidm sent by Dr. Spillman, 

 with simply the habitat Tennessee lliver, were four of this species. 

 I presume they are from that part of the river wliicli is in or near to 

 Alabama. All the three specimens are very similar in color, size and 

 bands. It is one of that group wliich approaches the genus Lithasia 

 by the thickening of the columella above and below, but it has no 



L. F.W. S. IV. 20 



