AND DESCRIPTIONS OP NEW SPECIES. 



10^ 



liata^ but differs in the region of the base of the columella being more 

 deeply impressed. The oblique striae are more distinct, and no speci- 

 men which I obtained is in the least hirsute. 



Carocolla Helicoides. Plate XV. fig. 34, a, b, c. 



Testa orbiculata, fused, supra piano convexd, suhtus inflata, hnperforatii, oblique 

 striata; anfractibus quinque; spira obtusissimd; apertura contracta: labroalbo, lato 

 et reflexo, c1e)ifibus duobus instrudo, quorum inferior longus et laminatus, superior 

 parvus et conicus est; columella dentem unicum, longum, elevatum et incurvum 

 habente. 



Shell orbicular, fuscous, plano-convex above, inflated below, imperforate, ob- 

 liquely striated; whirls five; spire very obtuse ; aperture contracted ; outer lip white, 

 broad, and reflected, furnished with two teeth, the inferior one long and lamellar, 

 the superior one small and conical ; columella with a long, elevated, incurved tooth. 



Hab. Tennessee, near Nashville, Professor Vanuxem. 



My Cabinet. 

 Cabinet of Professor Vanuxem. 

 Helix palliuta? Say, Var. a, Academy of Natural Sciences. Vol. II, 

 p. 152. 

 Diam. eigh teen-twentieths, Length nine-twentieths of an inch. 



Remarks. — Among the fine shells brought by Professor Vanuxem 

 some years since from a tour through the Western states were two 

 specimens of this beautiful Carocolla. In its specific characters it resem- 

 bles the Helix paUiata of Say, and Helix caroliniensis described in this 

 paper. It is destitute of the hirsute appearance of the palliata. and is 

 entirely distinct in the flatness of the whirls of the spire. In the ca- 

 roliniensis the base of the columella is more impressed and the whirls 

 more inflated. 



