198 A. K Verrill — Mollusca of the New England Coast. 

 Cyclostrema cingulatum Yerriii, sp. nov. 



Plate XXXII, figure 14. 



Shell small, thin, translucent, spirally lined, depressed, with a low 

 s{)ire, 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 

 obliqtiely 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 tliin 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' 80", in 547 fathoms 

 (No. 38,100). One specimen. 



This species is remarkable for its very obliq\ie 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 Cyclostrema i» somewhat doubtful. 



