PLEUROCERA. 101 



angle forming the carina is continued, is well defined on all the 

 whorls, and immediately below it is a hair-like elevated line parallel 

 to it. The area at the base of the columella is of a fine yellow, and 

 contrasts sharply with the dark-brown band above. It is allied to 

 Chikasahacnsis (nobis), but differs in being more gracefully slender, 

 having different bands and less impressed sutures. The aperture is 

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



42 a. P. strictum, Lea. 



Trypanostoma strictum, LEA, Proc. Acad. Nat. Sci.,p. 272, 18G2. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 352, t. 39, f. 224. Obs., ix, p. 174. 



Description. — Shell carinate, rather attenuate, thin, semi-transparent, 

 pale horn-color, single banded ; spire regularly conical ; sutures lin- 

 ear: whorls about six, flattened above; aperture rather ^. ,^„ 

 ' It- Fig. 193. 



small, rhomboidal, whitish and single banded within ; outer 

 lip sharp, slightly sinuous ; columella slightly bent in and 

 twisted. 



Habitat.— ?>o\it\). Carolina; Prof. L, Vanuxem. 



Diameter, •24 ; length, -CO inch. 



Observations. — Among the numerous raoUusca brought from the 

 South long since by my friend, the late Prof, Vanuxem, I found 

 a single specimen of this species, which is different from all others 

 brought by him. I do not know from what part of South Carolina it 

 came, but probably from Spartanburg District, as many of his spec- 

 imens were from there. This is a small, very regularly formed 

 species, in general outline near to lativittatum, herein described, but 

 totally different in the band, that species having it broad and dark 

 while this is hair-like and pale. It is also more fusiform. The 

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



P. lativittatum has a line below the angle which this shell 

 has not. 



43. P. modestum, Lka> 



lo modesta, Lea, Proc. Acad. Kat. Sci., p. 394, 18(51 . Jour. Acad. Nat. Sci., v, pt, 3, 

 p. 348, t.39, f.216, Obs., ix, p. 170. 



Description. — Shell smooth, conical, greenish horn-color; spire 

 regularly conical; sutures impressed; whorls nine, flattened, angular 



