276 HELICID^. 



centinus of Di*. Pfeiffer. The distinctions given seem to 

 be mostly drawn from the number of the bands, and the 

 greater or less ruddiness of the lip and aperture, and 

 not from the more essential characters of form and sculp- 

 ture. — [g.] 



4. BULiaiUS DEALBATUS, SAY. 

 Plates LI. LI. a. LI. 4. 



B. testa conica, ventricosa, perforata, glabra, alba, strigis 

 cinereis longitudinalibus irregulariter notata ; anfractibus sex 

 vel septem, ventricosis; apertura ovali ; labro simplici, acute, 

 ad cokimellam sub-reflexo, intus sub-incrassato. 



SYNONYMS AND EEFEBENCES. 



Helix dealbata^ Say, Journ. Acad. II. 1.59. 



BuUmiis dealhattcs, PoiiEZ & Mich. Galerie, I. 139, pi. 13, f. 3, 4. 



Philippi, Icon. I. p. 15S, pi. 2, f. 6. 



Pfeiffer, Monog. Helic. Viv. II. 187. 



Reeve, Conch. Icon. fig. 455. 

 Bidimus dealhatits, Beck, Index, 72. 

 Zehrina dealbata. Held, in Isis, 1S37, p. 917. 

 Balimus aUernatiis, Say, Dissem. &c. ; Des. of New Terr. Shells, &c. 25. 



DESCRIPTION. 



Animal not observed. 



Shell conical, rather ventricose, white, with longitu- 

 dinal lines and blotches of ash ; whorls six to seven, ven- 

 ti'icose, acuminate ; suture impressed, aperture oval ; lip 

 acute, a little thickened within, somewhat reflected at its 

 columellar portion, and partially hiding the umbilicus. 

 UmbiUcus open, small, rather deep. 



