160 UNIVALVE SHELLS 



mens of this species were sent to the Academy from 

 Alabama, by Mr. Samuel Hazard; and a single de- 

 pauperated specimen was found by myself on the 

 banks of the Missouri. 



• tttt Umbilicated ; labrum reflected. 



16. H. ^profunda. Shell pale horn-colour ; 

 spire convex, very little elevated; whorls five, regu- 

 larly rounded, and wrinkled transversely ; body 

 whorl with a single revolving rufous line, which is 

 almost concealed upon the spire by the suture, but 

 which passes for a short distance above the aper- 

 ture; aperture dilated; labrum reflected, white, and 

 excepting near the superior angle flat, a slightly pro- 

 jecting callus near the base on the inner edge ; 

 umbilicus large, profound, exhibiting all the volu- 

 tions to the apex. 



Transverse diameter 19-20 of an inch. 



Var. A. Mutilineated with rufous. 



Var. b. Rufous line obsolete. 



Inhabits Ohio, Mississippi and Missouri banks. 



A pretty shell, neatly ornamented by the rufous 

 zone; the spire is very much depressed. Specimens 

 occurred near Cincinnati on the Ohio, and at En- 

 gineer Cantonment near Council Bluff, on the Mis- 

 souri. 



Besides the above new species, T have observed 

 in the western regions, the following known species, 



