A. K Verri// — 3foUusca of the New England Coast. 425 



the opposite direction on the lateral and inner surfaces; the transverse 

 riblets are most elevated on the upper sides of the whorls, where they 

 rise into small, thin lamellae; they also form similar lamellae on the 

 inner and lower surfaces ; the revolving lines are most conspicuous 

 around the periphery ; minute but distinctly raised lines of growth 

 also cross the intervals between the riblets. In a front view of the 

 base the shell appears umbilicated and the upper whorls can be 

 partially seen within the umbilicus. Color silvery white, slightly 

 iridescent. 



Length (including only the three last whorls), 5™"* ; breadth, 4™"' ; 

 diameter of aperture, 1'6""". 



Station 2229, in 1,423 fathoms, one dead but fresh specimen. (No. 

 44,648). 



This singular shell bears no resemblance to any other known from 

 this region. The soft parts and operculum being unknown, it is 

 referred to this genus only provisionally, but its form and the pearly 

 structure of the shell indicate that this is probably its proper place. 



Margarita, sp. nov. 



A broken specimen of a large and handsome species was taken at 

 station 2265, in 70 fathoms, off Chesapeake Bay. The shell is mod- 

 ^erately elevated, with rather convex whorls and a narrowly canalicu- 

 late suture. The umbilicus is deep and moderately large, crenulated 

 within by several spiral ribs. On the outer and lower surfaces of the 

 whorls there are several sharply cut, elevated spiral cinguli, with deep 

 furrows between. These are crossed by strong, oblique, raised lines 

 of growth, which produce small nodules on the upper ones, and above 

 the shoulder take the form of oblique riblets, running down from the 

 suture. The upper w^iorls are broken off. 



Puncturella abyssicola Verriii, sp. nov. 



Shell moderately large, elliptical or ovate in outline, a little nar- 

 rowed anteriorly* evenly convex along the sides, and rounded poste- 

 riorly, moderately elevated, with the apex small, not very prominent, 

 acute and curved backward and inward, situated a little behind the 

 middle. The posterior slope is at .first a little concave, owing to the 

 position of the beak ; the anterior slope is gently convex. The 

 foramen is elongated fusiform, broadest in the middle, tapering both 

 ways to acute points, but most acute anteriorly ; its posterior end 

 does not reach the vertex, and terminates some distance from the 



