198 A. FE. Verrilli—Mollusca of the New England Coast. 
Cyclostrema cingulatum Verri!l, sp. nov. 
PLATE XXXII, FIGURE 14. 
Shell small, thin, translucent, spirally lined, depressed, with a low 
spire, an oblique base, a large funnel-shaped umbilicus, and a wide, 
oblique aperture. 
Whorls about three and one-half. The nuclear whorl is smooth, 
small, rounded, a little prominent and incurved at tip; the next is 
strongly convex, swelling a little more strongly below the suture, 
which is decidedly impressed and slightly channeled. The body- 
whorl is very large, constituting the greater part of the shell, very 
convex, and more broadly rounded above than beneath, the most 
convex portion being on the base, below the periphery. The sur- 
face of the whorls, except the nucleus, is minutely roughened by fine, 
close, oblique and somewhat flexuous lines of growth, some of which 
are a little raised, especially near the suture, where they run 
obliquely backward, and have an indistinctly fibrous and wavy 
appearance. ‘The upper whorls have no spiral lines, but the last 
whorl is surrounded by a number of thin, sharp, distinctly elevated, 
distant spiral cinguli, the intervals between them being from five to 
ten times their breadth; the uppermost is at some distance from the 
suture and there are only about six or seven above the periphery ; 
below the periphery and on the base they become closer together and 
more numerous, eight to ten being visible in a view of the under sur- 
face; on the base the intervals between are mostly four or five times 
their breadth. The umbilicus is funnel-shaped, rather large and 
deep, and not defined by any definite border. ‘The aperture is large 
and very oblique, broad-ovate, somewhat narrowed posteriorly, and 
broadly and evenly rounded in front; the outer lip is thin and sharp, 
evenly arched; the pillar-lip is attached only for a short distance to 
the body-whorl, and shows a thin, free edge. Color translucent 
grayish white. Animal not known. 
Length, 2™™; breadth, 2:2™"; breadth of aperture, 1°2™™. 
Station 2048, N. lat. 40° 02’, W. long. 68° 50’ 30", in 547 fathoms 
(No. 38,100). One specimen. 
This species is remarkable for its very oblique aperture; the wide, 
funnel-shaped umbilicus, and the peculiar, thread-like spiral lines, 
which surround the body-whorl and base. Whether it belongs to 
the genus Oyclostrema is somewhat doubtful, 
