152 A. E. Verrill — Molhtscu of the Nein Enyland Coast. 



white and translucent, with the exception of tlie nucleus. Epidermis 

 not apparent. Operculum wanting. 



Length of one of the largest examples, 10'"'" ; greatest breadth, 

 5mm . length of body-whorl to tip of canal, 7""" ; length of aperture, 

 5""" ; its breadth, 2-5"^'". 



Stations 2041,2042, 2043, 2076, 2084, and 2115, in 906 to 1608 

 fathoms. Albatross, 1883. The greatest number of living specimens 

 occurred at station 2084, N. latitude 40° 16' 50", W. longitude 67° 

 05' 15", in 1290 fathoms, (Xo. 38,308). 



This is a small and very elegant species, remarkable for the con- 

 vexity of its whorls, and its very broad subsutural band. Tiie canal 

 is narrower and more constricted at its base than is usual in this 

 genus. The sculpture is strongly marked, but does not give the 

 rough appearance seen in P. Benedicti^ which is also a longer and more 

 fusiform shell, but has considerable resemblance in its sculpture. P. 

 Diomedem is also a more elongated shell, with less convex Avhorls, 

 and its subsutural band is narrower and crossed by conspicuous 

 prolongations of the ribs. It bears some resemblance to P. /onnosa 

 {Defi'cnicia fornwsa Jeif.), but tliat has less prominent ribs, less con- 

 spicuously shouldered whorls, and a diiferently shaped aperture. 



This species is named in honor of W. E. SafFord, Ensign IJ. S. X., 

 who was a member of the Fish Commission party, in 1883. 



PleurotOlXiella Diomedese Verrill and Smith, sp. nov. 

 Plate XXXI, figures 5, 5a. 



Shell white, delicate, rather small, fusiform, with an acute spire and 

 distinctly angulated whorls, crossed by prominent flexuous ribs, which 

 extend upward to the sutui^e, and with rather coarse revolving lines, 

 usually absent on the wide subsutural band, which is concave at a 

 little distance from the suture. The posterior sinus is rather broad 

 and deep, a little removed from the suture. Whorls four or five 

 below the nuclear wdiorls, of which there are four. Tlie body-whorl 

 is large and moderately convex, strongly angulated at the shoulder, 

 which is prominent and bears a scries of small rounded nodules at the 

 angle of the ribs ; above the shoulder the whorls are decidedly con- 

 cave in line with the posterior sinus, but have a narrow, convex band 

 just below the suture. The subsutural band is crossed by thin but 

 strongly raised continuations of the ribs, which recede in a strong 

 curvature in crossing the concave portion, but advance abruptly and 

 rise into small prominent, narrow or compressed tubercles in crossing 

 the convex portion, close to the snture ; at the shoulder the ribs be 



