190 A, EF. Verrill—Mollusca of the New England Coast. 
band, which are closer together than the others, are excurved in the 
middle, bending abruptly forward to join the shoulder-carina, which 
they do not cross, nor do they form prominences on the sutural 
carina; those of the peripheral band curve in the opposite direction, 
their convex side being toward the aperture. In the narrower 
spaces between the outer basal cinguli similar riblets are also 
present, but are here oblique, finer, and less distinct; the spaces 
between the carinz are also marked by fine, raised spiral lines, visi- 
ble with a lens, which do not interrupt the riblets; often some of 
these, near the median carina, are larger than the rest. The apical 
whorl is a little prominent, small, regular, smooth and glassy. The 
suture often appears slightly channeled, when the sutural carina is a 
little removed from it, owing to the fact that the peripheral carina of 
the previous whorl is nearly coincident with the suture. The carina . 
defining the shoulder often appears double or grooved at its summit, 
on the last whorl. The umbilicus is narrow, but deep and _ spirally 
twisted, being more or less encroached upon by the incurved colu- 
mella-edge. The aperture is‘irregularly angulated and somewhat 
three-lobed, with two distinct, somewhat produced, narrow sinuses 
in front; a deep, rather wide notch or posterior sinus corresponding 
to the subsutural band; and a strongly excavated, rounded sinus at 
the base of the columella. The outer lip is thin, sharp, angulated at 
the terminations of the carine, and projects strongly forward at the 
periphery and bends outward in the form of two very short, rather 
narrow, rounded canals anteriorly. These are nearly equal in size, 
the outermost corresponding to a slight convex ridge on the outer 
part of the base, the inner one corresponding to the termination of 
the columella-margin ; the latter projects forward as a rudimentary 
canal. The columella-margin is short, somewhat thickened, very 
strongly spirally curved, and much excurved near its junction with 
the body-whorl, opposite the umbilicus, beyond which it bears a 
small, slightly prominent, obtuse tooth. Color translucent white, 
with a pearly luster or iridescence in fresh specimens. Operculum 
thin, pale yellowish horn-color. 
Length, 4:5"; breadth, 3""; length of body-whorl and aperture, 
3mm; breadth of aperture, 1-7™™. 
One living specimen from station 2038, N. lat. 38° 30’ 30", W. 
long. 69° 08’ 25”, in 2033 fathoms (No. 388,092), the figured type ; 
four specimens from station 2084, N. lat. 40° 16’ 50", W. long. 67° 
05' 15”, in 1290 fathoms (No. 38,249), one living ; station 2043, in 
1467 fathoms, one dead (No. 38,269). 
