MARINE MOLLUSCA OF THE UNITED STATES. 3l 
mella with a broad callus, somewhat flattened and twisted at its 
lower portion; not extending so far as the lip on the opposite 
side of the canal. 
Length 75, diam. 47 mill. 
New Jersey (rare), northwards. 
This is the American prototype of the B. undatum of Europe, 
which it closely resembles. It is distinguished by the following 
differences: the whorls are more convex, the spire is shorter, and 
the diameter of shell proportionally greater; the aperture is smaller 
and more circular; the sinus of the outer lip is broader and shal- 
lower, and nearer the middle of the lip; the aperture is (in fresh 
specimens) golden within, while in undatum it is white or choco- 
late-colored ; the columella is shorter; the ciliation of the perios- 
traca is short and sparse, never long and furry as in good speci- 
mens of the European species; finally, it never reaches the size 
or number of whorls of the latter. 
4. B. Torrent, Stimpson. Fig. 46. 
Review of Northern Buccinums, p. 23. 1865. 
Dawson, Canad. Nat., ii. 415, t. 7, £5. 1857. 
Buceinum ciliatum (part.), Gould., Invert. Mass. 807. 1841. 
Shell of moderate size, white, thin; spire acute; suture im- 
pressed; whorls seven, regularly convex, neither carinated nor 
angulated. Longitudinal folds about twenty-two, very regular, 
straight, not at all oblique, and about equalling their interspaces 
in width, becoming obsolete on the body-whorl except occasion- 
ally at the suture. Transverse striation sharp ‘and regular, the 
grooves narrow and deeply cut. The primary ridges are very 
numerous and crowded, the narrower and less prominent ones 
usually alternating by threes or fours with the stronger ones. 
The primary grooves are much narrower than the corresponding 
ridges. The secondary grooves are few in number, occurring for 
the most part only on the greater ridges. Aperture rather broad, 
half as long as the shell; outer lip thin, effuse, projecting below, 
with its superior sinus very broad and shallow or obsolete; folds 
of the columella little prominent. Periostraca light-yellowish, 
short-ciliated with triangular fimbrie at the intersections of the 
growth lines with the transverse striz. Color within the aperture 
white, or pale-yellowish. 
Length 53, diam. 33 mill. 
Banks of Newfoundland. 
