A. JS. Verrill — Mollusca of the Nev) England Coast. 203 



The animal, in alcohol, has a large rounded foot, a broad head, 

 witli small tentacles and a large frontal area, extending back on each 

 side in the form of a wide lobe. The mouth is conspicuous, with 

 a swollen, fleshy lobe on each side, and one in front. 



This species somewhat resembles C. concentrica Jeflf., which 

 occurred, according to Mr. Jeffreys, in the same way, in Teredo-hoYQdi 

 wood, associated with G. spinigera and Idas argentea. But C. 

 co7icentriGa is both figured and described by Mr. Jeffreys as desti- 

 tute of radiating lines between the concentric ribs, while in our 

 species the radiating lines are distinctly visible on all parts, even 

 close to the extreme tip ; therefore it is probable that they are dis- 

 tinct, though closely related, species. 



Cocculina spinigera Jeffreys. 



Proc. Zool. Soc. London, p. 393, pi. 44, figs. 1-lc, June, 1883. 



Shell small, thin, rather depressed, with the outline pretty regu- 

 larly elliptical; apex moderately elevated, small, acute, curved back- 

 ward, but not distinctly incurved, unless at the extreme tip, situated 

 at about the posterior third of the shell. The sculpture consists of 

 numerous fine radiating lines, which are more or less obscured by 

 extraneous growths, but appear to bear, each, a row of minute epi- 

 dermal spines, as described by Mr. Jeffreys. In our specimen, how- 

 ever, the spines are mostly concealed by minute sponges, etc., which 

 cover the whole surface of the shell. The animal appears to resem- 

 ble closely that of the preceding species. 



Station 997, N. lat. 39° 42', W. long. 71° 32', in 335 fathoms, 1881, 

 in Teredo-bored wood (Nos. 38,091 and 38,095), fifteen living; sta- 

 tion 2115, N. lat. 35° 49' 30", W. long. 74° 34' 45", in 843 fathoms 

 (No. 38,094), one living specimen, 1883. 



This is a somewhat doubtful species. Mr. W. H. Dall, to whom I 

 sent some of ray specimens, thought that they might be the young of 

 C. Beanii Dall. 



Cocculina Dalli Verrill, sp. nov. 



Shell moderately elevated, with the front slope long and convex ; 

 the apex is small, acute, situated far back, nearly over the posterior 

 margin, and not turned to either side ; the posterior slope is abrupt 

 and concave. Aperture broad oblong-elliptical, with the margin 

 sharp and plain, muscular scars distinct. The sculpture consists, on 

 the anterior half, of numerous well-marked but small, raised, radiat- 



Tbans, Cokn. Acad., Vol. VI. 26 May 26, 1884. 



