A. E. Merrill — Catalogue of Marine Mollusca. 
559 
Cadulus Jeffreysii Monterosato. 
Cadulus subfusiformis? Jeffreys, British Conch., v, p. 196, pi. 101, fig. 3 ( non Sars, 
teste Monterosato). 
Cadulus Jeffreysii Terrill, Amer. Journ. Sci., xx, p. 392, Nov., 1880; Proc. U. S. 
Nat. Mus., iii, p. 395, 18S0. 
This is, perhaps, only a variation of the preceding species. Station 
871, in 115 fathoms, off Martha’s Vineyard. 
LAMELLIBRANCHIATA. 
Xylophaga dorsalis (Turton) Forbes and Hanley. 
. Plate XIJY, figure 9. 
Many living specimens of this species have been found in bits of 
old wood, dredged by the U. S. Fish Commission, in Casco Bay, 
1873; Gulf of Maine, in 100 to 110 fathoms, about thirty miles off 
Cape Ann, 1877 ; and in various parts of Massachusetts Bay and 
Cape Cod Bay. It had previously been recorded by Mr. J. F. Whit- 
eaves from Gaspe Bay. Off* Martha’s Vineyard, stations 880 and 998, 
in 252 and 302 fathoms, 1880 and 1881. Found on the European 
coast south to the Adriatic. 
Neaera multiCOStata Terrill and Smith. 
Necera multicostata Terrill and Smith, in Terrill, Proc. U. S. Nat. Mus., iii, p. 398, 
1880. 
Necera alternata Dali, Bulletin Mus. Comp. Zool., ix, p. 110 (no description) 1881, 
( non D’Orbigny). 
Plate LTIII, figure 40. 
This fine, large species is easily distinguished from most others 
by the numerous fine radiating ribs, on the anterior half, changing 
posteriorly to much coarser and more distant ones, the largest close 
to the base of the rostrum. The rostrum itself is moderately long 
and decidedly narrow and pinched up, usually with a strong incurv- 
ature at the base, on the ventral side, and with the dorsal outline 
more or less concave, descending lower than the hinge-line. Ante- 
riorly the dorsal margin rises above the beaks, and is broadly 
rounded. The cartilage-pit is broad, rounded -triangular, and is 
strongly bent downward from the hinge-margin, in the left valve; 
the posterior lateral tooth of the right valve is low and long, contin- 
uous with the cartilage-pit, and with a very obtuse summit, which is 
often strongly excurved. Commencing behind the beaks, beneath 
