572 
A. K. Verr ill — Catalogue of Marine Mollusc a. 
The same remark applies to an elongated ovate shell from the same 
region, resembling M. ( Tellimya ) ferruginosa , to which I referred it, 
in a former paper. It may be identical with the last. 
A shell, encrusted in the same way, dredged off Cape Cod, in 1874, 
was then identified as Lascea rubra , but I now doubt the correctness 
of that identification. The specimens are not at hand for further 
examination. 
Venericardia borealis , var. Novanglim (Morse). 
Adinobolus ( Cyclocardia ) Nova-anglice Morse. First Rep. Trustees Peabody Acad. 
Sci., p. 76, cut, 1869. 
Cyclocardia Novanglice Verriil, Rep. Invert. Anim. Vineyard Sd., in Rep. U. S. Fish 
Com., i, pp. 418, 684 (auth. cop., p. 390), pi. 29, fig. 215, 1874. 
This appears to be only an inconstant variety of the common V. 
borealis , and has a range coextensive with the latter. 
Leda unca Gould. 
Leda unca Gould, Proc. Post. Soc. Nat. Hist., viii, p. 282, 1862; Otia Conch., p. 239 
(=? Leda acuta Conrad, described as fossil). 
Verriil, Amer. Journ. Sci., xx, p. 392, Nov., 1880; U. S. Nat. Mus., iii, p. 401, 
1880 (description). 
Plate LVIII, figure 41. 
Mr. Dali has identified our shells with those taken in the Gulf of 
Mexico, by the “ Blake ” Expedition. He refers them to L. Jamai- 
censis D’Orbigny. I am not satisfied that this identification is cor- 
rect, for D’Orbigny’s figure is not very like our shells, of which we 
have taken large numbers. 
Taken in abundance, alive and dead, at many of the stations, both 
south of Martha’s Vineyard and south of Newport, R. I., in 85 to 
155 fathoms, especially at stations 871, 873, 874 and 876, 1880. 
Additional localities, in 1881, were stations 921, 949, 951, 1038, in 65 
to 219 fathoms. 
Gulf of Mexico, 54 to 640 fathoms (t.. Dali). 
Leda pernula (Muller). 
Leda per nula G. 0. Sars, op. cit., p. 35, pi. 5, figs. 1, a-d. 
Verriil, Proc. U. S. Nat. Mus., iii, p. 401, Jan., 1881. 
A specimen that appears to be a typical example of this species 
was dredged by us in 1877, off Halifax, in 59 fathoms. Another 
was taken at station 1025, in 216 fathoms, off Martha’s Vineyard, 
1881. 
