MARINE MOLLUSCA OF THE UNITED STATES, 30 
4, N. acuta, Say. Fig. 54. 
Journ. Philad. Acad., ii. 284. 1822. 
Conic-acute, cancellate, so as to appear granulate; granules 
prominent, somewhat transverse, inequidistant. Spiral grooves 
six in number; spire longer than the body-whorl, slender, acute. 
Beak distinguished by a depression from the body-whorl, and 
slightly reflected; lip thickened, with elevated lines on the fauces, 
not attaining the margin. Color whitish. 
Length 13 mill. 
Southern Ooast. 
5. N. untcincta, Say. Fig. 55. 
Journ. Philad. Acad., v. 211. 1826. 
Shell sub-ovate, conical. Whorls eight, with ten to twelve re- 
volving lines and transverse undulations; apex acute; lip with 
ten revolving strie within; pillar lip concave in the middle; two: 
obsolete stfie, and a deeper one at the base. Color yellowish- 
white or ash-gray.; body-whorl with a brown band. 
Length 23 mill. 
South Carolina. 
6. N. consENsA, Ravenel. 
Proc. Acad. Nat. Sciences, Philad. 43. 1861. 
Shell ovate-conical, ribbed and crossed by numerous revolving 
strie ; whorls seven, and the apex; whorls rounded, with eleven 
strong ribs; suture deep, scalloped by the ribs; revolving strix 
crossing the ribs, as well as the interstitial spaces. 
Aperture nearly oval, outer lip much thickened, denticulate 
within, the largest tooth being in the form of a ridge next the 
canal; pillar much hollowed, with slight callus above, much thick- 
ened to form the canal, which is short, oblique, and turned back- 
wards; lower portion of the pillar white, covered with crowded, 
inconspicuous, revolving striz, with a deep groove at the edge of 
the canal. 
Color of the shell generally yellowish-brown, with a narrow 
deep-brown band immediately next the white projection at the 
canal; next to this, on the body-whorl, is a much wider band of 
. lighter brown, which revolves at the suture to the apex of the 
shell; all other portions of the surface are marked by delicate 
lines, more or less grouped, of yellowish-brown. On the thick- 
ened portion of the outer lip these lines are here and there more 
deeply colored in spots. 
