A. E. Verrilli—Mollusca of the New England Coast. 415 
% 
intervals usually considerably exceeding their breadth, but becoming 
narrower at the base of the canal, much smaller and less distinct on 
the subsutural band and usually absent on its upper part. On the 
lower whorls of the spire there are usually about four of the larger 
revolving cinguli, of which the uppermost forms the carina at the 
shoulder; they cross alike the ribs and their intervals, often rising 
into little tubercles in crossing the ribs. The nucleus is small, regu- 
larly tapered, very acute, the first whorl being very minute; its 
whorls are minutely reticulated by two sets of fine, oblique lines. 
The aperture is fusiform, with an acute posterior angle and a strongly 
excavated inner margin; the outer lip is thin, somewhat angulated 
at the shoulder, with a broad, shallow sinus just above it. The canal 
is a little elongated, tapered, slightly constricted at its base by the 
slight incurvature of the outer lip. The columella is nearly straight, 
with a strongly sinuated inner margin. The surface is lustrous and 
the texture somewhat vitreous, with a bluish white tint. There is no 
operculum. 
Length, 8™™; breadth, 5"; length of aperture, 5™™; its breadth, 
gmm_- A somewhat more slender specimen measures in length, 9™™; 
in breadth, 4°6™"; length of body-whorl, 7™™; length of aperture, 
557". breadth, 2:37. 
Station 2,212, in 428 fathoms, one living specimen (No. 44,654) ; 
station 2,213, in 384 fathoms, two living specimens (No. 40,472). 
This delicate species has a general resemblance to several others of 
this genus, such as P. bandella Dall., P. Sandersoni V., and the 
young of P. Agassizii, but it differs from all these in its more delicate 
texture, greater transparency, and small, very acute nucleus, as well as 
in the details of its sculpture. Its subsutural band is unusually 
broad, and the whorls are decidedly angulated in the middle. 
Pleurotomella Lottz Verrill, sp. nov. 
PLATE XLIV, FIGURE 7. 
Shell small, short, ovate-fusiform, moderately stout, with slightly 
shouldered, convex whorls, and a regularly tapered, acute spire. 
Suture shallow, but well-marked. Whorls about four and one-half, 
besides the large nucleus, which consists of about three and one-half 
gradually increasing whorls. ‘The whorls of the spire are obscurely 
shouldered at about the middle, above which the broad, sloping sub- 
sutural band is slightly concave. 
The sculpture on the penultimate whorl consists of about six ele- 
vated, rounded, revolving cinguli, with some much finer intermediate 
Trans. Conn. Acan., VoL. VI. 52 APRIL, 1885. 
