70 HELICID^. 



large and conical, lower tentacles under the upper, 

 white, very small. Head and neck finely mottled with 

 black, mantle grayish, foot hght saffron-color, a safii-on 

 border around the respii-atory foramen. A deep fui-row 

 running from under the anterior part of the mantle, on 

 each side, downward and forward, terminating behind the 

 inferior tentacle. Length of the animal somewhat more 

 than that of the shell. 



Shell. Ovate, pale green, yellowish green, amber- 

 colored, or cuneous, very thin and fragile, pellucid, some- 

 times roseate at apex. Periostraca shuiing, minutely 

 wrinkled or striated. Whorls rather more than three, 

 the last very large, and much expanded, and more or 

 less oblique ; spire very small, not prominent nor pointed ; 

 suture distinct, impressed. Aperture oval, large and 

 expanded, more or less oblique ; columellar margin with 

 a shght testaceous glazing ; columella thin, sharp, nar- 

 rowed ; peristome thin, its edge blunted by the reflection 

 of the periostraca. 



Greatest length about one inch, ordinary length three- 

 fourths. 



Geographical Disteibution. Inhabits all the north- 

 em and middle States from Llaine to Missouri. We have 

 noticed it as far south as Arkansas. 



Remarks. The shell of this species, as it usually 

 occm's in the northern States, is extremely delicate, con- 

 sisting merely of a transparent periostraca, with only cal- 



