196 A. E. Verrill—Mollusca of the New England Ooast. 
Odostomia tornata Verrill, sp. nov. 
Shell small, conical, consisting of about six whorls, which are flat- 
tened and taper regularly to a very acute apex. Each whorl is sur- 
rounded by two very strongly marked, broad, revolving grooves, 
with nearly perpendicular edges; one of these is situated just above 
the suture; the other, which is somewhat broader, surrounds the 
middle of the whorl; the two are separated by a raised, flattened 
revolving band, about as wide as the grooves; a similar but some- 
what wider raised band intervenes between the upper groove and the 
suture, which is not impressed and not very distinct, as it lies at the 
edge of the groove. The apical whorl is very minute and upturned. 
The base of the shell is somewhat produced and nearly smooth. 
Aperture irregularly ovate, acute above, broadly rounded and flar- 
ing anteriorly. The outer lip is flattened laterally and a little pro- 
duced and effuse anteriorly, forming a rounded angle where it joins 
the columella, which has a somewhat reflexed, nearly straight, outer 
margin. ‘The inner lip has a strong, prominent, acute tooth or fold 
at the junction of the columella with the body-whorl. There is a 
narrow umbilical chink, somewhat concealed by the everted margin 
of the columella. 
Length, 3"™; breadth, 1°5™™; length of aperture, 1™. 
Station 2109, in 142 fathoms, off Cape Hatteras, 1883. One speci- 
men. 
This species is remarkable for the size and depth of the two 
revolving furrows. 
Odostomia disparilis Verrill, sp. nov. 
Shell elongated, slender, regularly tapering to an acute tip. 
Whorls about seven, moderately convex, or a little flattened in the 
middle. The whorls of the spire with both longitudinal ribs and 
revolving lines, while the last whorl is nearly smooth, having only 
very faint revolving lines. 
Suture conspicuous, decidedly impressed. On the lower whorls 
of the spire the ribs are prominent, thick, and obtuse, about fourteen 
to sixteen in number, separated by intervals narrower than their own 
breadth, and running nearly straight across the breadth of the whorl ; 
the narrow and deep interstices are crossed by numerous fine revoly- 
ing lines, which are not distinct on the ribs. On the last whorl faint 
indications of ribs occasionally appear as subsutural crenulations, 
disappearing a short distance below the suture. Aperture rather 
