216 HELICID^. 



54. HELIX CUMBERLANDIANA, LEA. 



Plate XXVI. 



H. testa, late umbilicata, lenticular!, acute carinata, radi- 

 atim costato-striata, cinerea vel flavida, fusco sub-tessellata ; 

 spira depressa, anfractibus qulnis planulatis, marginatis ; 

 apertura rhomboideo-circulari, labro acuto. 



SYNONYMS AND EEFEEENCES. 



Carocolla Cumberlandiana, Lea, Am. Phil. Trans. VIII. 229, pi. 6, f. 61. 



De Kay, New York Report, 47. 

 Helix Cumberlandiana, Pfeiifee, Monog. Helio. Viv. I. 125. 



DESCKIPTION. 



Animal not known. 



Shell lenticular, acutely carinatecl, rather thin, sculp- 

 tured with coarse, acute rib-strice, of a pale yello\Yish, 

 or sometimes ash color, irregularly checked with radiat- 

 ing, waved, brown blotches. Spire depressed, of about 

 five whorls, very slightly convex, but excavated towards 

 the margin, which is acute, and with a marginal, im- 

 pressed line on both sides of the edge. Beneath, some- 

 what less convex, but the striae less prominent, and its 

 centre excavated by a deep, broad umbilicus, one-third 

 the diameter of the base, and exhibiting all the whorls to 

 the apex. Aperture rather wider than high, rendered 

 somewhat rhomboidal by the acute carina ; lip simple. 



Diameter three-fourths of an inch ; axis about one- 

 fourth of an inch. 



