184 LAND AND FRESH- WATER SHELLS OF N. A. [PART IV. 



form, somewhat thick, yellowish-green, four-banded, or without 

 bands; spire obtusely conical; whorls six, slightly flattened; aper- 

 ture rather large, rhoraboidal, whitish within; outer lip acute, 

 'scarcely sinuous; columella bent in, thickened, somewhat 

 twisted. 



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

 well removed from the left margin. 



Habitat. — Butts County, Georgia; Rev. G. White. 

 Diameter, -31 ; length, -05 of an inch. 



Observations. — This is a most variable species, most are carinate, 

 but many are striate, and some are plicate, and on a few neither of 

 these characters can be observed, the surface being entirely smooth. 

 All are disposed to carination on the apical whorls. Many are with- 

 out bands, but most are four-banded, having the two medial bands 

 approximate. All were more or less covered with the black oxide of 

 iron. In outline it is nearly allied to Melaiiia (Goniohasis) Lecontiana 

 (nobis), but it is not so fusiform, nor so large, nor is it always pli- 

 cate, as that species is. Some of the specimens are entirely white 

 inside, and thickened, but usually they are four-banded. In several 

 instances there is an indistinct fifth band. The aperture is more 

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



56. G. Viennaensis, Lea. 



Ooniobasis Viennaensis, Lea, Proc. Acad. Nat. Sci., p. 267, 1862. Jour. Acad. Nat. 

 Sci. V, pt. 3, p. 315, t. 37, f. 160, March, 1863. Obs., ix, p. 137. 



Description. — Shell folded, subfusiform, olivaceous, rather thin, 

 without bands ; spire regularly conical ; sutures irregularly im- 

 pressed ; whorls seven, flattened ; aperture rather large, rhoraboidal, 



bluish- white within; outer lip acute, sinuous; columella 



Fig. 359. 

 bent in, thickened and somewhat twisted below. 



Habitat. — Near Vienna, Dooly County, Georgia, in a small 

 stream, tributary to Flint Eiver; Eev. G. White. 



Diameter, -30; length, -90 of an inch. 



Observations. — A number of this species came with Dooly- p^ 

 ensis, herein described, but it is quite a different species. It 

 is regularly conical, while the other is subcylindrical, and the 

 ribs are more numerous and closer, and are not quite so much curved. 

 The aperture is also larger. It is allied to Melanin {Goniohasis) 

 Deshayesiana (nobis), but while it is nearly of the same outline it 



