286 LAND AND FRESH-AVATER SHELLS OF N. A. [PART IV. 



Habitat.— Sycamore, Claiborne County, Tennessee; J. Lewis, M.D. 

 Diameter, -20; length, -07 of an inch. 



Observations. — A single specimen only was received from Dr. Lewis. 

 It is nearly of the size of Mclania {Goniobasis) terebrans (nobis), 

 Fig. 552. but is a slimmer and darker colored species. It is very nearly 

 of the same outline of Melania (Goniobasis) strigosa (nobis), 

 but much smaller, slimmer and darker color. The specimen 

 befoi-e me has neither folds nor angle on the apical whorls. 

 Below the sutures there is a line of a lighter green. The 

 aperture is about one-flfth the length of the shell. — Lea. 



Of a large number before me many specimens liave folds and 

 the upper whorls angular. 



188. G. Draytonii, Lea. 



Goniobasis Draijlonil, Lea, Proc. Acad. Nat. Sci., p. 264, 18G2. Jour. Acad. Nat. 



Sci.. V, pt. 3, p. 300, t. 37, f. 134, March, 18o3. Obs., ix, p. 122. 

 Goniobasis nigrina. Lea, Proc. Acad. Nat. Sci., p. 2G3, 1832. Jour. Acad. Nat. Sci., 



V, pt. 3, p. 299, t. 37, f. 133. Obs. ix, p. 121. 



Description. — Shell smooth, conoidal, somewhat thick, dark chest- 

 nut-brown, without bands, or obscurely banded; spire somewhat 

 raised; sutures very much impressed; whorls about six, convex; 

 aperture small, ovate, dark brown within; outer lip acute, slightly 

 sinuous ; columella very much bent in and twisted. 



Operculum subrotund, thin, light brown, with the polar point well 

 towards the middle on the left. 



Habitat. — Fort George, Oregon; J. Drayton: also at Walla. 



Diameter, -27 ; length, -GS of an inch. 



Observations. — A number of these specimens were sent to me by 

 Professor J. Henry, Secretary of the Smithsonian Institution, having 

 been collected by the late Mr. Drayton, and to his memory rig.. "isa. 

 I dedicate it. It is allied to Melania (Goniobasis) nigrina 

 (nobis), but it is not so polished and is a much thicker shell. 

 Some of the specimens before me have a thickened outer lip, 

 with a lighter margin. The deep color within is made by 

 broad, obscure bands. Some of the specimens have a white thick- 

 ening in the interior at the base, and some have a lighter brown mark 

 on the exterior at the base of the axis. — Lea. 



Goniobasis nigrina. — Shell smooth, small, conical, rather thin, 

 nearly black, polished; spire somewhat elevated; sutui-es impressed; 



