HELTX. 



123 



Fi2. 206. 



Subgenus TRIODOPSIS, Raf. 



Shell imperforate or umbilicated, orbicularly depressed or sub- 

 globose ; more or less obliquely striated ; whirls 5-7, the last 

 somewhat deflexed in front ; aperture sinuously-coarctate, sub- 

 triangular; peristome white, thickened, broadly and angularly 

 reflexed, usually dentate ; 

 parietal wall of the aper- 

 ture with a strong, ob- 

 liquely entering denticle. 



Animal (of 5! palliata) 

 long, narrow, with long 



Animal of Helix palliata. 



and slender eye-pedun- 

 cles ; foot narrow behind, terminating in an acute point. 



Helix palliata, Say. — Shell with the umbilicus closed, thin, de- 

 pressed ; epidermis dark brown or chestnut-color and rough with minute, 

 acute projections and «tiff hairs ; whirls five, flattened above and rounded 

 below, with numerous very fine, oblique stria ; aperture three-lobed, much 

 contracted by the peristome and teeth ; peristome white, sometimes edged 



