156 A. EF. Verrill— Mollusca of the New England Coast. 
but not very convex, witha distinct, flattened, smooth subsutural 
band. Suture well marked, but not deep, decidedly oblique. Sur- 
face everywhere covered with conspicuous, regular, raised, revolving 
cinguli, in some parts with one or more smaller revolving lines in the 
spaces-between them. The cinguli are obtusely rounded and entirely 
smooth, as well as the spaces between them, which are of about the 
same breadth; on the penultimate whorl there are about fifteen cin- 
guli, and on the upper whorls five or six. 
The large, acute, brown nucleus consists of about four and a half 
whorls, which increase regularly ; the apical whorl is small, rounded 
and prominent; the others are distinctly carinated and shouldered ; 
the portion above the shoulder slopes at a wide angle and is a little 
convex and nearly smooth, except close to the carina; the part below 
the carina of the shoulder is flattened and nearly straight, or even 
narrowed toward the suture, and crossed by regularly spaced, thin, 
elevated transverse ribs, with wider intervals; these ribs extend a 
little above the carina and then fade out; they run nearly straight 
across all the whorls, except the first two, where they are more or 
less oblique; there is usually, on the larger whorls, a raised revolving 
line, or small carina, just above the suture. 
The aperture is very elongated and narrowed at the base of the 
canal, which is much prolonged and slender, a little curved, owing to 
a slight sinuous curvature of the columella-margin. The posterior 
notch in the outer lip is rather deep and narrow, situated immediately 
at the suture. The subsutural band, corresponding to it, shows faint 
curved lines of growth, parallel with its margin. Color white, except 
the nucleus, which is pale chestnut-brown. 
Length of one of the largest specimens, 23"; breadth, 6°5™™ ; 
height of spire, 11™"; length of aperture and canal, 11°5™"; breadth 
of aperture, 3”™. 
Living specimens at station 2038, N. latitude 38° 30’ 30”, W. long- 
jtude 69° 08’ 25", in 2033 fathoms (No. 34,845); station 2041, N. 
latitude 39° 22’ 50”, W. longitude 68° 25’, in 1608 fathoms (No. 
37,871); station 2084, N. latitude 40° 16” 50”, W. longitude 67° 05’ 
15”, in 1290 fathoms (No. 37,846); and at 2115, N. latitude 35° 49’ 
30”, W. longitude 74° 34' 45", in 843 fathoms (No. 35,597). Alba- 
tross, 1883. 
This elegant species is dedicated to Miss Katharine J. Bush, who 
has, for several years, acted as assistant in the working up of the 
large collections of mollusca, dredged by the U. 8. Fish Comniission, 
