A. E. Verrill — Mollusca of the New England Coast. 197 



narrow-ovate, much narrowed posteriorly, and terminating in a sliglit 

 sutnral 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 

 umbdical chink, formed by the reliexed margin of the lip. Apical 

 whorl broken. 

 ( Length, 3-2""» ; breadth, 1'"'" ; length of aperture, O-S™"". 



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 iimer mar- 

 gin, gives it the form and appearance of certain species of Gingula 

 (some varieties of C. acideus). 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 

 Turbo7iiUa. 



RHIPHIDOG-LOSSA. 

 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, 



