A. E. Verrill— Mollusca of the New England Coast. 197 
narrow-ovate, much narrowed posteriorly, and terminating in a slight 
sutural sinus; anteriorly broadly and evenly rounded, without any 
angle next the columella-margin ; lip thin, broadly rounded on the 
outer margin, evenly rounded anteriorly, passing into the thin colu- 
mella-margin in a regular curve; the inner lip is continuous, with a 
free margin along the body-whorl, which is oblique and almost in 
line with the columella-margin. This margin is interrupted by a 
small but distinct tooth, about at the middle, just opposite the minute 
umbilical chink, formed by the reflexed margin of the lip. Apical 
whorl broken. 
, Length, 3°2™™; breadth, 1™™; length of aperture, 0:8™™. 
Station 2109, in 142 fathoms, off Cape Hatteras, 1883. One speci- 
men. 
This is a very slender and delicate species, remarkable for the 
very sudden change in sculpture on the penultimate whorl. This, 
however, may not be a constant character of the species, but due to 
some injury to the single specimen we have had for examination. 
But in other respects the species is quite unlike any of those hitherto 
described from our coast. The aperture is remarkable for its evenly 
arched anterior and inner margins, which, with the free inner mar- 
gin, gives it the form and appearance of certain species of Cingula 
(some varieties of C. aculeus). The presence of a distinct tooth 
shows, however, that it is undoubtedly a true Odostomia. The 
sculpture on the upper whorls is, however, more like that found in 
Turbonilla. 
RHIPHIDOGLOSSA. 
Leptothyra induta Watson. 
Leptothyra (induta, var.) albida Dall, Bull. Mus. Comp. Zool., vol. ix, p. 48, 1881. 
Several specimens of this species were taken at station 2109, off 
Cape Hatteras, m 142 fathoms (Nos. 35,369 and 35,385). 
These have been identified by direct comparison with West Indian 
specimens given to me by Mr. Dall, with which they agree in all 
respects. 
Very young specimens, about two millimeters in diameter, have a 
well developed spiral umbilicus ; somewhat larger specimens have only 
a small perforation; while in all the mature specimens the umbilicus 
is entirely closed. The specimens recorded by Mr. Dall are from the 
Gulf of Mexico and West Indies, in 125 to 2805 fathoms, 
