478 A. E. Verrill— Catalogue of Marine Mollusca. 
Bela pleurotomaria (Couthouy) Adams. 
Fusus pleurotomarius Couthouy, Boston Journal of Natural History, vol. ii., p. 107 
pl. 1, fig. 9, 1838. 
Fusus rufus Gould, Invert. of Mass., ed. i, p. 290, fig. 192 (non Montagu). 
? Buccinum pyramidale Strém, N. A. Dan., iii, p. 296, fig. 22 (? non Bela pyramidalis 
G. O. Sars). 
Defrancia Vahlii (Beck) Moller, 1842 (t. Lovén). 
Mangelia pyramidalis Stimpson, Shells of New England, p. 49, 1851. 
Bela pleurotomaria H. and A. Adams, Genera Recent Mollusea, 1, p. 92, 1858. 
Gould, Invert. of Mass., ed. ii, p. 355, fig, 625. 
Verrill, Report Invert. Anim. of Vineyard Sd., in Ist Rep. U. S. Fish Com., p. 
637, 1874, (auth. cop., p. 343). 
Shell long-fusiform, with a high, tapering, acute spire. Whorls 
seven or more, well-rounded, not distinctly shouldered nor carinated, 
constricted above the sutures, which are well-impressed and not very 
oblique; no distinct subsutural band. Ribs about 13 to 16 on the 
last whorl, rather prominent, rounded, sigmoid, strongly excurved 
on the upper part of the whorl, incurved and less prominent close to 
the suture; they fade out below the middle of the whorl; on the 
preceding whorls they are prominent at and above the middle, and 
decidedly sigmoid; the intervals between them are deeply concave 
and rather wider than the ribs. The spiral cinguli are numerous, 
fine, wavy, unequal, and inconspicuous, becoming more distinct, and 
rather coarser toward the anterior part of the body-whorl, and on 
the uppermost whorls; they are often absent across the ribs, and 
frequently are scarcely apparent, even with a lens, on the more con- 
vex part of the lower whorls, where they are always fine; they are 
also fine on the subsutural portion. 
The nucleus is small, but prominent, with the whorls separated by 
deep sutures; the first half-whorl is smooth; then three raised spiral 
cinguli appear, which become strong carine on the second whorl; 
on the third and fourth whorls these are crossed by raised. riblets, 
producing a cancellated sculpture. 
The aperture is short and small, narrow-ovate; the outer lip has a 
very distinct, wide, shallow sinus; below this it is evenly rounded, 
avery little incurved at the base of the canal, which is short, straight, 
and narrow. 
Color, when fresh, pale chestnut-brown to reddish brown, usually 
paler anteriorly. 
A specimen of the stouter variety, having seven whorls, is 13°25" 
breadth, 6"; length of body-whorl, 9°"; breadth, 5°15"™ ; 
— 8 
long ; 
