412 A. E. Verrili— Mollusca of the New England Coast. 
shoulder. The nucleus, which consists of four whorls, is chestnut- 
brown in color, large, regularly tapered, very acute, the apical whorl 
being very minute, but regularly coiled; the three lower nuclear 
whorls are very minutely decussated by two sets of very fine, oblique 
lines. The aperture is long, rather narrow, with the posterior end 
acutely angled; the siphon is nearly straight, rather long and narrow. 
The columella is nearly straight; the outer lip curves strongly for- 
ward in the middle and has a rather broad and deep, rounded sinus 
situated a little below the suture. 
The entire shell below the nucleus is translucent bluish white in 
live specimens, and the surface is lustrous. 
Length of the largest specimen, 52"; breadth, 18™™"; length of 
last whorl in front, 36™"; length of aperture, 27"; its greatest 
breadth, 8™™; length of nucleus, 2™™. 
The largest specimen, which was dead, occurred at station 2,230, in 
1,168 fathoms (No. 44,650) ; a smaller, living specimen (No. 44,649), 
was taken at station 2,222, in 1,537 fathoms. 
This fine species is named in honor of Mr. George Gwyn Jeffreys, 
the distinguished conchologist. 
Pleurotomella tincta Verrill, sp. nov. 
PLaTE XLIV, FIGURE 4. 
Shell moderately large, somewhat stout, nearly regularly fusiform, 
rather thin, delicate and translucent in texture, in the living speci- 
mens having a light chestnut-brown color and a lustrous surface. 
The spire is rather short, rapidly tapered, acute. The largest speci- 
men consists of five whorls besides the nucleus, which apparently 
contains about two and one-half whorls, but is eroded in both of our 
specimens. 
The whorls of the spire have a distinct, nodulous shoulder and a 
broad, sloping, concave subsutural band, occupying about one-half 
the breadth of the whorls; on the last whorl the shoulder is convexly 
rounded and destitute of nodules, but is crossed by numerous, dis- 
tinct, flexuous lines of growth which rise into distinct, sharply raised 
riblets on the subsutural band just below the suture; the surface is 
also covered, except on the subsutural band, by numerous small, 
regular, sharply impressed grooves, which appear a little wavy or 
crinkled, owing to the crossing of the lines of growth; the grooves 
are separated by smooth, flattened interspaces exceeding their own 
width. On the preceding whorls the nodules on the shoulder are 
