A. E. Verrill—Mollusca of the New England Coast. 423 
just below the suture. The upper whorls are also crossed by numer- 
ous, regular, nearly straight, narrow, longitudinal ribs which, with 
the revolving lines, produce a cancellated structure and at the 
shoulder they rise into small, rounded nodules, and form another 
row of smaller nodules in crossing the subsutural line. On the lower 
whorls the ribs disappear or become indistinguishable from the lines 
of growth which cover the whole surface. The aperture is narrow- 
elliptical ; the outer lip is regularly arched, except at the shoulder, 
where it is slightly angulated; the columella is excurved and has a 
distinct, oblique spiral fold at about the middle; the canal is very short, 
broad and open, without any constriction. The shell is translucent 
bluish white internally. The epidermis is pale, yellowish green, thin, 
firm and close, a little roughened by the fine lines of growth. The 
operculum is well-developed, but smaller than the aperture, elongated 
and irregularly ovate, nearly straight on the outer margin, convex on 
the inner, bluntly rounded posteriorly, terminating anteriorly in a 
narrow point, which is slightly falcate, but not spiral ; color yellowish 
green. 
Length of the shell (consisting of only the five lower whorls), 
41™™ ; the eroded apical whorls may have been 4 or 5™™ additional ; 
greatest breadth, 37™"; length of body-whorl in front, 20™™; length 
of aperture, 22™"; its breadth, 8'°5™™; length of operculum, 13™™; 
breadth, 6™™. 
A single living specimen was taken at station 2224, in 2,574 fath- 
oms, N. lat. 36° 16’ 30”, W. long. 68° 21'00". (No. 44,647.) 
This species appears to be related to J. Ossian-Sarsii Friele. It 
is at least probably congeneric with the latter, but is a much more 
slender and delicate shell and quite different in its sculpture and 
form. 
Omalaxis nobilis Verrill, sp. nov. 
PuaTE XLIV, FIGURE 12. 
Shell strong, coiled closely in a flat spire, which is nearly plain on 
the upper or right hand surface and strongly coneave on the left or 
base. The shell consists of five visible whorls, the apical whorl being — 
small and concealed by the succeeding one. The whorls are strongly 
angulated, nearly quadrangular, with two strong, prominent, rounded 
carine at the periphery, one at each angle, the upper one somewhat 
more prominent than the other. The surface of the periphery, be- 
tween these carine, is concave and sculptured by several small, spi- 
ral ribs, one of which, next the upper carina, is double, while two or 
TRANS. Conn, Acap., Vou, VI, 53 APRIL, 1885, 
