42 new-york fauna — mollusca. 



Helix perspectiva. 



PLATE III. FIG. 38. A. b. — (STATE COLLECTION.) 



Helix perspectiva. Sat, Journal Academy Nat. Sciences, Vol. 1, p. 18. 

 H. id. Id. Long's Exped, St. Peters, Vol. 2, p. 258. 



Description. Shell small, orbicular, very much depressed. Whorls six, transversely 

 striated, with raised parallel acute lines, forming strongly impressed furrows between them. 

 Umbilicus very large, resembling an inverted spire ; in diameter equalling nearly the breadth 

 of the body-whorl, and exhibiting distinctly all the volutions. 



Color. Yellowish, sometimes tinged with rufous. 



Diameter, 0-3, Height, • 1 . 



Common in moist places, in the western district of the State. Found originally by Lesueur 

 near Lake Erie. Through inattention, the magnified figures b. c. are said to be of the natural 

 size. 



Helix profunda. 



PLATE III. FIG. 37. A. B. c — (STATE COLLECTION.) 



Helix profunda. Sat, Journ. Acad. Nat. Sciences, Vol. 2, p. 160. 

 H. richardi. Feeussac, Hist, des Moll. pi. 70, fig. 4. 

 H profunda. Sat, American Conchology, pi. 37. 



Description. Shell moderately large, convex, regularly ascending to the slightly elevated 

 spire. Whorls five, regularly rounded, with deeply impressed oblique wrinkles. Aperture 

 oblique, dilated. Lip reflected and (except near the superior angle) flat, with a slightly pro- 

 jecting tooth-like callus on the inner edge towards the base. Umbilicus large, profound, and 

 exhibiting all the volutions ; base somewhat excavated. The lower margin of the lip is almost 

 reflected over the umbilicus. 



Color. Uniform pale corneous or light ashen grey ; or more frequently a revolving rufous 

 line on the body-whorl, which is almost concealed upon the spire by the suture, but which 

 passes for a short distance above the aperture. Lip white on its reflected edge. 



Diameter, 0-9. Height, 0-6. 



Var. a. with many rufous lines. 



This species was sent to me from the western part of the State. It occurs also in Ohio 

 and Missouri. 



