GONIOBASIS. 153 



17. G. Couperii, Lea. 



Goniobasis Couperii, Lea, Proc. Acad. Xat. ScL, \^. 271, 18G2. Jour. Acad. Nat. Sci., 

 V, pt. 3, p. 341, t. 38, f. 205, March, 1863. Obs. ix, p. 163. 



Description. — Shell tuborciilate, plicate, striate above and below, 

 turreted, thiu, dark brown, banded at the base; spire turreted; 

 sutures very much impressed: whorls seven, subcarinate, with 

 compressed tubercles on and above the periphery ; aperture 

 very small, subrhomboidal, dark and single-banded within ; 

 outer lip creuulate, very sinuous ; columella bent in, twisted 

 and purple. 



Habitat.— 'Etovrah River ; Mr. Couper by J. Postell. 



Diameter, -27; length, -72 inch. 



Observations. — This ornamented little species was sent by Mr. 

 Postell with the Canbyi, which he found also in Etowah River. They 

 are closely allied, but Couperii is slimmer, has more striaj above the 

 periphery, which are all cut by the folds, thus filling the spire with 

 small, compressed tubercles. It differs also in being much darker, 

 iu not being maculate and in having a broad baud near the base which 

 is well marked inside. Below the periphery there are sis well- 

 defined, raised revolving striaj. The aperture is not quite one-third 

 the length of the shell. Mr. Postell informs me that this species, as 

 well as Canbiji and Doicnieana, from Etowah River, were brought 

 some years since by Mr. Couper, son of James Hamilton Couper, Esq., 

 of Ilopeton, near Darien, and I have great pleasure iu naming this 

 species after him. — Lea. 



18. G. inclinans, Lea. 



Goniobasis inclinans. Lea, Proc. Acad. Xat. Sci., p. 207, 1863. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 318, t. 37, f. IGO, March, 18G3. Obs. ix, p. 140. 



Description. — Shell very much folded, somewhat drawn out, rather 

 Fig. 293. thin, obscurely banded ; spire subattenuate, sharp pointed ; 

 sutures furrowed; whorls eight, flattened, covered with ob- 

 lique folds; aperture small, rhomboidal, pale brown within; 

 outer lip acute, sinuous; columella very much bent in, brown- 

 ish-red and very much twisted. 



Operculum ovate, very thin, light brown, with the polar 

 point nearer to the centre than usual. 



