164 A. FE. Verrill— Mollusea of the New England Coast. 
Whorls about eight, rather convex, strongly angulated, with a 
broad, concave subsutural band above the shoulder. The subsutural 
band is crossed by delicate, strongly excurved, distinctly raised lines 
of growth, which recede most at the middle of the band and bend 
far forward next the suture; a little below the suture there is usually 
a thin, raised spiral line; the rest of the band is destitute of spiral 
lines, except close to the shoulder. The upper whorls, just below the 
nucleus, are crossed by numerous very oblique, moderately elevated, 
but somewhat conspicuous ribs, of which the number is about eighteen 
to twenty, and these are separated by concave interspaces, about 
equal to their own breadth. The ribs terminate abruptly at the 
shoulder, so as to form there small, obtuse, somewhat angular nod- 
ules; but they decrease rapidly in crossing the whorls, and mostly 
fade out before reaching the suture. The spiral sculpture consists of 
numerous rather fine, thin, raised cinguli, which cross the ribs and 
interspaces alike, and are separated by intervals greater than their 
own breadth. On the last whorl the ribs disappear and only the 
spiral sculpture remains; the cinguli are here thicker and more ele- 
vated, and are roughened by numerous close, raised lines of growth, 
which cross both the cinguli and their interspaces ; at the base of the 
canal the spiral lines become finer and closer. The nuclear whorls 
are somewhat eroded in our specimen. There are apparently two 
small, rather prominent, regularly spiral whorls. The aperture is nar- 
row, oblong-ovate, strongly angulated at the shoulder and contracted 
above it, at the notch. The outer lip is thin and sharp, projecting 
considerably forward and broadly rounded below the shoulder. Pos- 
terior sinus a rather deep and very broad, well rounded notch, separa- 
ted a little from the suture, the deepest part corresponding to the 
middle of the wide subsutural band. Canal rather broad and short, 
scarcely differentiated from the aperture. Columella nearly straight, 
its inner margin with a slight sigmoid curvature ; inner lip somewhat 
excavated in the middle and covered by a thin layer of enamel. 
Color brownish white, without luster. Epidermis inconspicuous. 
Operculum dark horn-color. 
Length of the single specimen obtained, 21"™; breadth, 9"™; 
length of body-whorl and canal, 14"; length of aperture, 10M 3 
its breadth, 3™”. 
Station 2084, N. latitude 40° 16’ 50”, W. longitude 67° 05’ 15’, 
in 1290 fathoms. (One specimen, No. 38,067.) 
This species bears considerable resemblance to Z. nivale (Lov.) 
Sars, of Europe, but is distinct in the character of its sculpture. It 
