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424 A, EF. Verrill—Mollusca of the New England Coast. 
three are near the lower carina, leaving a comparatively smooth, 
depressed central area around the periphery; small spiral lines also 
appear on the surface of the large carine. The upper surface of the 
whorls is nearly flat and distinctly depressed below the level of the 
outer carina, which is often made double by a groove on its upper 
side; close to the suture there is also a slightly raised spiral ridge 
rising abruptly from the suture, which is narrow but distinct. The 
double peripheral carina appears on the preceding whorls close to, 
the suture. On the lower side the whorl is strongly depressed 
next the outer carina and then slopes inward with a slightly convex 
surface, which is covered with fine spiral striz, and has a slightly raised 
spiral ridge near the inner angle; this ridge and also the outer carina 
are visible on the whorls within the broad umbilical depression ; the 
nuclear whorls appear to be smooth so far as they are visible. The 
whorls are crossed by very distinct, close, raised lines of growth, 
which become prominent and form transverse nodules in crossing 
the principal carinz, but are elsewhere fine and close. On some 
parts the remnants of the epidermis can be seen, which appears to 
have been raised into fine lamelle along the lines of growth. The 
aperture is four-sided and somewhat trapezoidal, with the outer cor- 
ners squarely angled and the inner ones rounded; the outer side is 
flattened, while the inner side is pretty well rounded. The oper- 
culum is thin, horny, multispiral, somewhat concave and dark brown 
in color. The color of the living shell is pale chestnut-brown, irreg- 
ularly and indistinctly banded with yellowish white. 
Greatest diameter, 11™"; height, or breadth of last whorl, 3"™; 
diameter of aperture, 2°5™™. 
One living and one dead specimen occurrred at station 2265, off 
Chesapeake Bay, in 70 fathoms (No. 41,481). 
Delphinula nitida Verrill and Smith, sp. nov. 
PLATE XLIV, FIGURE 11. 
Shell small, fragile, very delicate, with a slight silvery iridescence. 
Our specimen, which has lost the apex, consists of three gradually 
enlarging whorls entirely disconnected with each other and nearly 
round in a cross section. When perfect the spire, must have been 
rather elevated, gradually tapering toan acute tip. The surface is 
sculptured by thin, elevated riblets, crossed by distinctly raised, 
revolving lines of about the same size, producing a pretty regularly 
cancellated or reticulated sculpture, in which the meshes are mostly 
elongated in the direction of the spire, around the periphery, but in 
