184 A. FE. Verrill— Mollusca of the New England Coast. 
Cithna tenella, var. costulata Jeff. 
Lacuna tenella Jeffreys, Brit. Conch., p. 204, pl. 101, fig. 7. 
Cithna tenella, var. costulata Jeffreys, Proc. Zool. Soc. London, 1883, p. 110. 
This species was taken at station 2638, N. lat. 38° 30' 30’, W. 
long. 69° 08' 25”, in 2033 fathoms (No. 38,069). One living specimen. 
It has been taken on the European coasts at several localities, in 
114 to 2050 fathoms, from off the Faroe Islands to the Azores and 
Mediterranean. It was taken off Pernambuco, Brazil, and east of 
Japan by the Challenger (Jeffreys). It occurs in the Pliocene of 
Sicily and Calabria, according to Jeffreys. 
Cithna cingulata Verrill, sp. nov. 
PLATE XXXII, FIGURE 7. 
Shell small, rather solid, depressed, with a low spire, and angu- 
lated, spirally striated whorls. Base broad, convex; umbilicus 
small and deep. The nucleus is relatively large, nearly smooth, 
glossy, deep chestnut-brown, composed of about three rapidly in- 
creasing whorls, the last of which is finely spirally striated; the 
apical whorl is minute and regularly coiled, not prominent; the 
change from the nucleus to the normal whorls is abrupt. Aside 
from the nucleus, there is rather more than one whorl, which 
increases rapidly and constitutes the bulk of the shell; this whorl is 
very convex at the periphery and more or less distinctly bicarinate ; 
one carina surrounds the periphery; the other at a short distance 
above this forms a slight, rather indistinct shoulder; the band 
between the upper carina and the suture is slightly convex and joins 
the preceding whorl nearly at right angles, bending inward at the 
suture so as to form a narrow and rather deep sutural groove. The 
whole surface, below the nucleus, both above and below, is covered 
by numerous, pretty regular, close, spiral -cinguli, separated by 
grooves of about the same breadth on the periphery, but more 
crowded on the base; the surface is also roughened by fine and 
minute lines of growth. On the last whorl there are four or five cin- 
guli between the carine. The umbilicus is regular, somewhat fun- 
nel-shaped, narrow and deep. The aperture is rather large, roundish, 
with the anterior and inner borders slightly patulous, and the outer 
border expanded and more or less angulated at the carine; the 
inner lip is continuous, with a distinct edge along the narrow part, 
which is attached to the pillar. Columella-margin somewhat flat- 
