112 NEW-YORK FAUNA — MOLLUSCA. 
lip with a wide and deep groove behind, ending in a profound umbilicus. Opercle horny, 
subspiral. 
Color. Uniform yellowish horn, under which condition it has been termed L. fusca. Fre- 
quently yellowish or soiled white, with four or five dark purplish or reddish bands. 
Length, 0°3. 
This small shell, which has also been named T’. guadrifasciatus, occurs on the shores of 
Long island sound. I am indebted to Mr. Linsley of Stratford, for numerous specimens. 
(EXTRA-LIMITAL,) 
L. neritoidea. (Govuxp, Op. cit. fig. 170.) Shell globular-ovate, with three and a half whorls, the last 
very large, smooth, yellowish green: aperture semilunar, oblique; umbilicus large and deep. 
Length, 0-2. Massachusetts. 
GENUS TURRITELLA. Lamarck. 
Animal with a proboscis, and a fringe above it like a veil. ‘Tentacles long, filamentous, with 
the eyes on the outer base on a tubercle. Shell, turreted, pointed, elongated, slender, 
spirally striated: aperture rounded, entire ; lip disjoined above, the outer lip thin. Opercle 
horny. 
TURRITELLA INTERRUPTA. 
PLATE VI. FIG. 123. 
Turritella interrupta. Totren, Am. Jour. of Sci. Vol. 28, p. 352, pl. fig. 7. 
re id. Apams, Bost. Jour. Nat. Hist. Vol. 2, p. 275. 
T. (Eulima ?) id. Gou.p, Invertebrata of Mass. p. 268, fig, 173. 
Description. Shell small and slender. Whorls about ten, almost flat, on which are from 
twenty to thirty transverse obtuse ribs, crossed by about fourteen subequal revolving lines 
interrupted by the ribs; these are arranged in pairs, so closely applied as often to be con- 
founded in one: below the middle of the body-whorl, the ribs become obsolete, and the 
revolving lines are uninterrupted : a slight shoulder on each whorl, causes the sutures to be 
quite distinct. Aperture ovate, sharply angular above ; inner lip slightly everted. 
Color. Whitish brown and amber-colored. 
Length, 0°2-0°3. Width, 0°08. 
This species was discovered and named originally by Col. Totten of the U. S. Engineers, 
who dredged it from the coast of Rhode-Island. It was subsequently found on the coast of 
Massachusetts. My friend Dr. Budd obtained it by dredging in the East river, in mud, 
opposite Newtown creek, and in five fathom water off the Quarantine ground. 
