SOMATOGYRUS. 63 
5. SOMATOGYRUS AUREUS, Tryon. 
Plate 17, fig. 14. 
Shell subglobose, spire short, suture well 
impressed, apex obtuse; aperture pyriform, 
broadly rounded below; columella lip slightly 
reflected and appressed, scarcely covering the 
narrow umbilicus. Color golden yellow. 
Alt. 4:5, diam. 4 mill.. 
Tennessee River. 
This species much resembles S. integer, Say, 
with which at first I had confounded it. My 
closer attention was directed to it on account 
of the difference of color. Integer has propor- 
tionally a smaller spire, and the whorls are not 
so well rounded, and, consequently, suture not 
so well impressed. 
—_—_— 
6. SOMATOGYRUS PARVULUS, Tryon. 
Plate 17, fig. 15. 
Shell very small, globose, rather solid, con- 
sisting of four convex whorls; spire small, 
(44) 
