60 
ANCULOTUS SUBGLOBOSU S . 
Plate VIII. — Fig. 14. 
DESCRIPTION. 
Shell subglobose, with a depressed convex spire; 
epidermis olivaceous with variable greenish spiral 
bands; interior bluish, with purple spots or bands; 
labrum thin; aperture rounded, nearly as long as 
broad; labium a little flattened. 
Anculotus suhglobosus , Say. Journal of the Aca- 
demy of Natural Sciences, vol. v. p. 128 . 
OBSERVATIONS. 
Inhabits the Holston and Tennessee rivers, adher- 
ing to rocks and stones. Young shells have the apex 
acute, and perfect. 
ANCULOTUS ANGOLA T US . 
Plate VIII. — Fig. 15. 
DESCRIPTION. 
Shell subglobose; body whorl ventricose, contract- 
ed above; biangulated; spire very short; volutions 
earinated at the suture; colour olivaceous, with 
about four series of dark quadrangular spots on the 
body whorl 
