64 SOMATOGYRUS. 



apex acute ; body whorl well rounded, with 

 aperture ovate, broadly rounded below ; pillar 

 lip slightly reflected, but not quite covering 

 the umbilicus. Dark olive-gray. 



Alt. 3, diam. 2-5 mill. 



Powell's River, E. Tennessee; Stephenson, 

 Ala. 



With the same number of whorls as S. inte- 

 ger, Say, this species is much smaller and more 

 solid. 



7. SOMATOGYRUS INTEGER, Smj. 

 Plate 17, fig. 16. 



" Subglobose, horn color, volutions rather 

 more than three, rounded, obsoletely wrinkled ; 

 spire very short, less than half the length of 

 the aperture, suture rather deeply impressed ; 

 body whorl large, aperture dilated ovate, acute 

 above ; columella flattened, polished ; labrum 

 regularly rounded ; base regularly rounded ; 

 umbilicus none. 



Alt. 5, diam. 4*5 inch. 



Inhabits the Ohio river and tributaries. 

 (45) 



