202 A. EB. Verrilli— Mollusca of the New England Coast. 
This species resembles the preceding in general appearance and in 
the smooth, polished surface, but it is not so broad in proportion; 
the aperture is more oblique, and ovate instead of circular, and there 
is a small umbilical perforation, not found in the other. 
Cocculina leptalea Verrill, sp. nov. 
PLATE XXXII, FIGURES 20, 20a, 200. 
Shell small, oblong-ovate, rather high, with a prominent, small 
compressed, strongly recurved, apex, with the tip small, strongly 
incurved, in eroded specimens becoming free and overarching, situa- 
ted at about the posterior third of the shell. 
The anterior slope of the shell is decidedly convex and consider- 
ably longer than the posterior slope, which is nearly straight, but a 
little concave beneath the apex; the side-slopes are moderately con- 
vex. The sculpture consists of strongly marked, raised, very thin, 
and pretty regular concentric cinguli, which usually become finer 
and much closer towards the apex, but continue nearly to the 
extreme tip in perfect specimens; the intervals on the lower part of 
the shell are four times as wide as the cinguli, and are crossed by 
numerous, fine, wavy, radiating lines, much finer and closer than the 
cinguli, but easily visible with a lens; in crossing the cinguli they 
become a little thickened and give the margin of the latter a slightly 
crenulated appearance when viewed from above. In some cases 
these slight thickenings have the appearance of minute beads strung 
along the upper margin of the cinguli. The aperture is oblong- 
ovate, a little narrower anteriorly, with the sides a little compressed, 
but still somewhat convex, and with the anterior and posterior mar- 
gins bluntly rounded. The margin is thin, sharp and plain. Color 
pale yellowish white. Epidermis indistinct. 
Length of the largest specimen, 4"; its breadth, 2°8"™; height, 
oO mes 
Station 2036, N. lat. 38° 52’ 40”, W. long. 69° 24’ 40”, in 1735 
fathoms (No. 35,128), one dead ; and station 2038, N. lat. 38° 30’ 30”, 
W. long. 69° 08’ 25”, in 2033 fathoms (No. 38,079), one in wood, liv- 
ing, figured type; and station 2105, N. lat. 37° 50’, W. long. 73° 03’ 
50”, in 1395 fathoms (No. 35,371), one living. 
At station 2038 a specimen occurred in decayed wood which had 
been bored by Xylophaga or Teredo. It was associated with 
Cocculina spinigera Jett. and Idas argentea Jeff. 
