94 LAND AND FRESH-AVATER SHELLS OF N. A. [pART IV. 



The aperture is about one-flfth the length of the shell. I name this 

 after Mr. A. 0. Currier, to whom I am indebted for it. —Lea. 



E. Plicate Species. 

 36. P. Sycamordnse, Lea. 



Trijpanosioma Sycamore use, Proc. Acad. Nat. Sci., p. 175, 1862. Jour. Acad. Nat. 

 Sci., V, pt. 3, p. 'iSS, t. 37, f. 104. Obs., ix, p. 105. 



Description. — Shell plicate, conical, yellowish horn-color, rather 



thick; spire attenuate, pointed; sutures impressed; whorls eleven, 



somewhat convex, cariuate above, plicate in the middle ; aper- 



Fio* 178 



ture rather small, rhomboidal, whitish within ; outer lip acute, 

 sinuous ; columella incurved, thickened below and twisted. 



Habitat. — Sycamore, Claiborne County, East Tennessee ; J. 

 Lewis, M. D. 

 Diameter, -SG; length, -92 inch. 



Observations. — A single specimen only is before me. It is 

 a rather small, very symmetrical species. The seven upper 

 whorls are cariuate, the three middle ones are furnished with numer- 

 ous rather obscure folds, the lower whorl is smooth. In outline it 

 resembles labiatum, herein described, but cannot be confounded with 

 that species which is not plicate nor yellowish, and the form of the 

 lower part of the aperture is very different. The aperture is little 

 more than the fourth of the length of the shell. — Lea. 



The figure is copied from Mr. Lea's plate. 



37. P. plicatum, Tryon. 



rieurocera plicatum, Tijyox, Proc. Acid. Nat. Sci., Oct., 1SG3. 



Description. — Shell ovate-conical, spire attenuate, the upper v.-horls 

 closely plicate, the lower ones smooth or obsoletely con- 

 centrically striate. Whorls but slightly convex, sutures 

 well impressed. Color light green, with usually a ligliter 

 band below the sutures and ornamented with narrow or 

 broad brown bauds. Aperture canaliculately produced. 

 The outer lip and columella twisted. 



Diameter, -35; length, -7 inch. 



Ilabitatf—'NashviWc, Tcnn. 



