148 A. EL Vervill— Mollusca of the New England Coast. 
sex ; among the several specimens of which the sex was determined 
the females have the body-whorl slightly more swollen than the 
males. 
Length of one of the largest female specimens, 55™" ; breadth, 
26™"; length of body-whorl to tip of canal, 40"; breadth of body- 
whorl, 22™™; length of spire, 26™™; length of aperture, 27™™ ; its 
breadth, 12™™. 
It was taken at the following stations by the Albatross in 1883: 
Nat. Mus. No. Station. N. lat. W. long. Fathoms. 
37,824 2,037 38° 53’ 00" 69° 23” 30” 1721 12 specimens, mostly living. 
37,806 2,038 38 30 30 69 08 25 2033 1 specimen, dead. 
37,814 2,041 39 22 50 68 25 1608 2 specimens, living. 
35,253 2,097 37 56 20 70 57 30 1917  1specimen, dead. 
35,275 2,098 37 40 30 70 37 30 2221 1 specimen, dead. 
This species is closely allied to P. Agassizii. It is a larger and 
stouter shell, with the whorls more angulated at the shoulder, and 
has a broader and more angular aperture. The sculpture differs con- 
siderably in details, and the columella is destitute of the pink or pale 
orange tint usually present in P. Agassizii. 
Pleurotomella Benedicti Verrill and Smith, sp. nov. 
PLATE XXXI, FIGURES 2, 2a. 
Shell fusiform, moderately stout, with a high, regularly tapered 
spire, and very convex, shouldered whorls, which have strong, oblique, 
transverse ribs rendered nodulous by well developed, raised cinguli. 
Whorls six, below the chestnut-colored nucleus. The suture is deep, 
not very oblique. The subsutural band is rather broad, concave, 
nearly smooth, contrasting strongly with the rest of the whorls ; its 
sculpture consists only of the deeply concave lines of growth, parallel 
with the notch in the lip. Below the subsutural band the whorls are 
abruptly swollen, forming a rounded shoulder. The transverse ribs, 
commencing at the shoulder, are prominently raised, rather oblique, 
and extend entirely across the whorls of the spire, becoming smaller 
next the suture; on the last whorl they extend to the base of the 
canal; they are obtuse at summit and separated by wider, deeply 
concave interspaces ; on the last whorls there are about sixteen ribs. 
Both the ribs and interspaces are crossed by well marked, somewhat 
unequal, raised, revolving lines, separated by narrow grooves; these, 
in passing over the ribs, produce small, somewhat conical, unequal 
nodules, which give a somewhat rough appearance to the surface of 
