220 HELICID^. 



Geographical Distribution. Has been found in 

 many places in Ohio and in Indiana, also at Greenwich, 

 N. Y. It probably inhabits all the low grounds border- 

 ing on the Ohio and its tributaries. 



Eemaeks. This shell resembles, in a considerable 

 degree the preceding, particularly when the epidermis of 

 that species has become bleached, but may be readily 

 distinguished from it on comparison. Its epidermis is 

 lighter, being nearly white ; it is smaller, yet has nearly 

 one more whorl ; it is less convex, and the whorls are 

 less prominent ; the strlre of increase are finer and more 

 delicate, and their direction is more nearly at right 

 angles with the suture ; the aperture is more nearly a 

 direct section of the whorl ; the body-whorl is more 

 rounded on the base ; the umbilicus is less spread or cup- 

 shaped, and, though deep, does not exhibit all the volu- 

 tions. The nucleus of the shell, or the original whorls, 

 which exist when the animal leaves its egg, are much 

 more minute and delicate. 



For this species and the description of it, I was ori- 

 ginally indebted to the late Dr. C. J. Ward of Roscoe, 

 Ohio. I have since received the shell from several 

 other sources. 



