OF CONCHOLOGY. 69 



A much smaller species than its nearest congener B. indie, 

 with angular volutions, less ventricose, and an angular col- 

 umella, which in the other is rounded; the sutural channel is 

 much less profound. 



B. striatum, Conrad. — PL 3, fig. 8. 



Description. — Pjriform ; spire moderately prominent, coni- 

 cal ; whorls nearly straight or indistinctly concave laterally ; 

 angles immediately above the suture furnished with numerous 

 small, close tubercles; suture impressed, not channelled; sur- 

 face covered with distinct revolving rugose lines, except a 

 space on the lower part of the body whorl, where they are 

 finer, and about four in number ; labrum within striated 

 throughout its whole length. 



Locality. — Virginia or Maryland. 



CYPR^EA, Lin. 



C. axjstulifera, Conrad. — PI. 4, fig. 19. 



Proceed. Acad. Nat. Sciences, 1862, p. 567. 

 This species is approximate to C. annularia, Brong. 



ETJLIMIDJ3. 



NISO, Risso. 



N. lineata, Conrad. — PI. 4, fig. 13. 



Description. — Subulate, polished, with obsolete revolving 

 lines; body whorl angulated and slightly carinated at its 

 greatest diameter; whorls 10 or 11, with a deep angular groove 

 at the suture. 



Bonellia lineata, Conrad. — Journ. Acad. Nat. Sciences, "Vol. 

 VIII., p. 188. 



Locality. — Calvert Cliffs, Md. 



AUKICULID^E. 



TIFATA ? A. and H. Adams. 



T. longidens, Conrad. — PI. 4, fig. 12. 



Descriptions. — Acutely oval ; spire conical, apex mucronate ; 

 whorls 7; suture profound; aperture very narrow, dentato- 

 striate within ; columella with an elongated, slightly curved 

 plait, directed obliquely upwards. 



