356 HELICINAD2E. 



3. HELICINA OCCULTA, SAY. 

 PLATE LXXIV. FIGURE 2. 



H. testa parva, solidula, conico-orbiculari, cretacea, stria- 

 tula ; anfractibus quinque, convexiusculis, ultimo angulato; 

 sutura lineari, marginata ; apertura parva, lunata ; labro 

 incrassato, ad columellam baud angulato. 



SYNONYMS AND REFERENCES. 



Olygyra occttlta, SAY, Journ. Acad. Nat. Sc. I. 182. 



Helicina occulta, SAY, Transylv. Journal of Medicine, IV. 529; 



Descr. of New Terr, and Fluv. Shells, (from the 

 Disseminator,) p. 15; 



American Conchology, pi. 46. figs. 1, 2, 3. 



DESCRIPTION. 



SHELL small, rather solid, low conical, acute at apex, 

 cretaceous, obviously striated ; spire of five nearly plane 

 whorls, the last of which is angular at the periphery, and 

 this angle continuing up the spire adjacent to the suture, 

 makes it appear double. The aperture is small, semi- 

 lunar ; the lip is scarcely reflexed, but is thickened 

 internally ; the columella is very short, and joins the lip 

 by a slightly waving curve, without forming an angle. 



Diameter one-fourth of an inch ; length of axis one- 

 fifth of an inch. 



GEOGRAPHICAL DISTRIBUTION. Found in Indiana, 

 Ohio, Mississippi, and probably throughout the valleys of 

 the Ohio and lower Mississippi. 



