6S AMERICAN JOURNAL 



C. ENGONATA, Conrad. — PI. 4, fig. 8. 



Descri'ption. — Short-fusiform, longitudinally ribbed, witli 

 prominent revolving lines, about 12 in number, from the 

 shoulder to base; whorls 5 ; spire conical, scalariform ; aper- 

 ture lunate; columella three-plaited, the middle one very 

 oblique. 



C. enqonata^ Conrad. — Journ. Acad. Nat. Sciences, Vol. 

 VIII., p. 188. 



Locality.— QaXYQvt Cliffs, Md. 

 C. PLAGIOSTOMA, Conrad.— PI. 4, fig. 15. 



Description. — Short-fusiform, with numerous prominent ribs, 

 and distant, prominent revolving lines; spire scalariform ; 

 whorls 6, with one prominent revolving line on the flattened 

 summit; aperture more than half the shell's length; colum- 

 ella three-plaited, the superior one very prominent, and con- 

 tinued into a ridge revolving to the base ; base narrow, slight- 

 ly produced and twisted ; sub-umbilicated. 



C. plagiostoma, Conrad.- — Journ. Acad. Nat. Sciences, Vol. 

 VII., p. 136. 



Locality. — James Eiver, near Smithfield, Virginia. 

 C. SCALARINA, Conrad. — PI. -1, fig. 17. 



Description. — Sub-fusiform; volutions 6; ribs numerous, 

 prominent ; revolving lines very prominent, distant, four on 

 the penultimate whorl below the angle, and four or five close, 

 fine lines above ; spire scalariform, prominent ; aperture less than 

 lialf the shell's length; labrum without lines, but with slight 

 furrows, corresponding to the ribs opposite ; columella three- 

 plaited, the two lower folds approximate; base slightly pro- 

 duced, sub-acute. 



Ljocality. — Virginia ? 



MUPJCIDJ^.. 



BUSYCON, Bolten. 

 B. ALVEATUM, Conrad. — PL 3, fig. 7. 



Description. — Pyriform or sub-fusiform ; substance mode- 

 rately thick; spire prominent, scalariform, angle of whorls 

 situated much above the middle, carinated on tlie angle : 

 summit channelled, the canal margined by a prominent line, 

 broad on the body whorl ; space between the two revolving 

 lines slightly concave; columella Avith a salient angle on its 

 lower half. 



Locality. — St. Mary's River, Md. 



