pressed : body whorl yellowish, with two rufous, revolving 

 lines equidistant from the suture, base and each other, the 

 superior one broader, and its locality a little flatter than 

 the general curvature : aperture ovate, acute above, mode- 

 rately dilated : labium with calcareous deposite, particu- 

 larly abo\e : labrum not projecting near the base, nor ar- 

 quated near its junction with the second volution : base 

 regularly rounded. 



DESCRIPTION. 



I found this species, in great abundance, on the Rocky 

 flats at the Falls of the Ohio, where they were left by the 

 subsiding of the river, in company with numerous other 

 shells. In old specimens the spire is very much eroded, 

 exhibiting a white, irregular surface. It varies a little in 

 colour, and a few occurred, of which the colour is fuscous, 

 the bands being obsolete. 



REFERENCE TO THE PEATE. 



The two lowest figures present different viewe of the fihell. 

 PLATE VIII. 



