B U C C I N I D yE . 73 



whorl, slender towards tlie tip, acute ; suture impressed, but not profoundly ; beak distin_ 

 guished by a depression from the body whorl, and slightly reflected ; labrum incrassated, 

 and with elevated lines upon the fauces, which do not attain the edge of the lip. — Say. 



This species is readily distinguished by the incrassated outer lip. 



It is very abundant in the Post-Pleiocene beds, and is recent on the Carolina and Georgia 

 shores. 



Plate XII. Fig. 3. 



Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



COLUMBELLA.— Lam. 



COLUM BELLA AVAR A. — Say. 



Plate XIL Fk;. i. 



Columbella avara, Saj/, Jour. Acad. Nat. Sci., Vol. 2, p. 230. 



Columbella avara, Ravenel, Cat. Coll, Shells, p. 17. 



Columbella avara, L. R. Gibbes, Tuomey's Geol. So. Ca., appendix, p. xx. 



Columbella avara, Adams, Boston Jour. Nat. Hist., Vol. 2, p. 363. 



Columbella avara, Gould, Invert. Mass., p. 313, fig. 197. 



Columbella avara, DeKay, Zool. New-York, Art. Mollusca, p. 139, pi. viii, fig. 179. 



Columbella avara, Stimpson, Shells of New-England, p. 48. 



Columbella avara, Tuomey Sf Holmes, Pleiocene Foss. So. Ca., p. 139, pi. xxviii, fig. 12. 



Astyris avara, H. Sf A. Adams, Gen. Mollusca, p. 187. 



Description. Shell small, elongated-ovate ; spire pointed, elevated ; whorls with spiral 

 impressed lines, and transverse elevated ribs ; ribs on body- whorl terminate about the 

 middle ; spiral lines on the base distinct ; labrum denticulated within ; columellar lip with 

 a distinct plate crenated on sub-margin ; suture distinct ; aperture about one-third the 

 length of the shell. 



This is an abundant species in the Post-Pleiocene beds, and common in a recent state 

 on the Atlantic sea-shores, from Massachusetts southward. 



Plate XII. Fig. 4, Natural size. 



' Locality. Simmons'. Museum, College of Charleston; Cabinet F. S. H. 



19 



