60 



ANCULOTUS SUBGLOBOSUS. 



Plate YIIL—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 subgJohosus, 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 ANGULATUS. 



Plate Y\\\.—Flg. 15. 



DESCRIPTION. 



Shell subglobose; body whorl ventricose, contract- 

 ed above; biangulated; spire very short; volutions 

 carinated at the suture; colour olivaceous, with 

 about four series of dark quadrangular spots on the 

 body whorl. 



