190 LAND AND FRESH-WATER SHELLS OF N. A. [pART IV. 



rliomboidal, bluish-white within ; outer lip acute, somewhat sinuous ; 

 columella bent in, j-ellowish above, whitish below and twisted. 



Habitat. — Grayson County, Kentucky ; S. S. Lyon. 



Diameter, -24; length, -04 of an inch. 



Observations. — Three specimens were sent to me by Mr. Lyon, 



taken on his geological survey of Kentucky. It is a graceful, 

 Fig. 371. 



greenish little species with the folds inclining to the left, and 



with a paler line below the suture. The body-whorl has no 

 folds, but is in two of the specimens covered with minute 

 irregular veins. The middle whorls are plicate, while the 

 apical whorls are carinate and striate. It is about the size of 

 cerea, herein described, but differs in outline and otlier characters- 

 In outline it is near Doohjensis, herein described, but is a much 

 smaller species, and differs in the folds and the aperture. The aper- 

 ture is about one-third the length of the shell. — Lea. 



65. G. purpurella, Lea. 



Goniobasis purpurella. Lea, Proc. Acad. Nat. Sci., p. 2G9, 1862. Jour. Acad. Nat. 

 Sci., vi, pt. 3, p. 327, t. 38, f. 183, March, 1863. Obs., ix, p. 149. 



Descrij)tion. — Shell folded, conical, thin, purplish, shining, banded 



or without bands; spire conical; sutures impressed; whorls about 



seven, flattened; aperture somewhat large, rhomboidal, dark within; 



outer lip acute, scarcely sinuous : columella bent in and twisted. 



^ ' ^ ' Fig.372. 



Habitat. — Caney Fork River, Tennessee; J. Lewis, M.D. 



Diameter, -22 ; length, -48 of an inch. ^ 



Observations. — Several specimens were sent to me by Dr. ^ffl 

 Lewis for examination, nearly all more or less imperfect. ^E' 

 They are usually without bands, but when banded the immber is four, 

 the two middle being approximate. An impressed line under the 

 suture cuts the folds, forming a row of granules. The folds are 

 close, inclining a little to the right. Below the suture some speci- 

 mens have a light line. This species is nearly allied to Melania 

 (Goniobasis) Sellersiana (nobis), but diff'ers in being more pointed, in 

 having bands and especially in having granules along the sutures. 

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



