[593] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 299 
the cirrus; a single strong black spine supports the setigerous lobe. 
The lower ramus has a rounded setigerous lobe, and a large broadly- 
rounded lamelliform process, nearly as long as the longest one of the 
upper ramus and much broader; the setigerous lobe bears a broad fan- 
shaped fascicle of compound sete, similar to those of the upper ramus, 
but a little shorter, and a single black basal spine; the ventral cirrus 
is slender, and there is a broad, rounded ventral lamella at its base. 
The setx are rather stout, with a broad, thin, blade-like, terminal piece, 
which is generally lanceolate, with a rounded point, and often some- 
what curved, but more commonly straight. A few sete have a slender 
acute terminal piece. Anal segment with numerous small slender papil- 
liform processes on each side, forming a circle. 
Length up to 35™"; breadth about 2.5™., 
Vineyard Sound, swimming actively at the surface, both in the even- 
ing and in the brightest sunshine, in the middle of the day; July 3 to 
August 11. 
DIOPATRA CUPREA Claparéde. Plate XIII, figs. 67, 68. (p. 346.) 
Annélides chétopodes du golfe de Naples, in Mémoires de la Société de Physiques 
et @Hist. Nat. de Genéve, vol. xix, p. 432, 1868. Nereis cuprea Bose, Hist. nat. 
des Vers, vol. i, p. 143 (t. Claparéde). 
Charleston, South Carolina, to Long Island Sound and Vineyard 
Sound. 
MARPHYSA LEIDYI Quatrefages. Plate XI, fig. 64. (p. 319.) 
Histoire nat. des Annelés, vol. i, p. 337, 1865 (M. Leidii). Eunice sanguinea 
Leidy, Mar. Inv. Fauna of Rhode Island and New Jersey, p. 15, 1855 (non 
Montagu). : 
Great Egg Harbor, New Jersey, to Long Island Sound and Vineyard 
Sound. Low-water mark to 10 fathoms. 
LyYcImDIcE AMERICANA Verrill, sp. nov. (p. 508.) 
Body depressed, slender, narrowed toward each end; segments well- 
marked. Head much depressed, oblong, narrowed somewhat toward 
the front, which is truncate and somewhat emarginate in the middle; 
lower side bilobed, the lobes well rounded. The two eyes are lateral, 
just outside the bases of the lateral antenne. The three antenne are 
subequal, nearly as long as the diameter of the head; the odd median 
one is apparently a little longer than the lateral, and placed slightly 
farther back. The dorsal cirri are long and slender, exceeding the 
diameter of the body in living specimens; they have a small lobe near 
the base. Anal cirri four; the two lower exceeding the diameter of the 
body ; the two upper ones less than half as long. Color light red, with 
a bright red dorsal vessel and dark brown intestines, showing through in 
the middle; eyes dark red. 
Length, while living, about 40™™; greatest diameter, 1.5"™. 
Off Gay Head, in 19 fathoms, soft mud. 
Like W 
