424 A. E. Verrill — 3Iollusca 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 carinte. The upper surface of the 

 whorls is nearly flat and distinctly depressed below the level of the 

 outer carina, wliich 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 slriaj, 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 wliorls appear to be smooth so far as they are visible. Tlie 

 whorls are crossed by very distinct, close, raised lines of growth, 

 which become prominent and form transverse nodules in crossing 

 the principal carime, 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 lamellas 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 iand indistinctly banded with yellowish white. 



Greatest diameter, 11"'"^; height, or breadth of last whorl, 3'"'"; 

 diameter of aperture, 2-6"^'". 



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 to an 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 scidpture, in which the meshes are mostly 

 elongated in the direction of the spire, around the jjeriphery, but in 



