{571] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 277 
style on the second pair of branchial plates in the male is strdight, 
slightly surpasses the cilia, and is acute at the end. 
The color in life is usually uniform dark green, sometimes with an 
obscure dorsal stripe of a lighter color. 
Length, 15. 
Abundant among eel-grass at Great Egg Harbor, New Jersey, and 
also found at New Haven, Connecticut. 
EPELYS TRILOBUS Smith. Plate VI, fig. 28. (p. 370.) 
Idotea triloba Say, loc. cit., p. 425, 1818. 
Great Egg Harbor, New Jersey to Vineyard Sound. 
EpELYS MONTOSUS Harger. (p. 370.) 
Idotea montosa Stimpson, Marine Invert., Grand Manan, p. 40, 1353. 
Bay of Fundy to Long Island Sound. 
JRA COPIOSA Stimpson. (p. 315.) 
Loc. cit., p. 40, Pl. 3, fig. 29, 1853. J. nivalis Packard, Memoirs Boston Soc. Nat. 
Hist., vol. i, 296, (non Kroyer.) 
Long Island Sound to Labrador. 
LIMNORIA LIGNORUM White. Plate VI, fig. 25. (p. 379.) 
Pop. Hist. Brit. Crust., p. 227, Pl. 12, fig. 5. Cymothoa lignorum Rathke, Skrivt. 
af Naturh. Selsk., vol. 101, t. 3, f. 14, 1799, (teste Bate and Westwood.) Lim- 
noria terebrans Leach, Trans. Linn. Soc., London, vol. xi, p. 371, 1815. Gould, 
Invertebrata of Massachusetts, p. 388, 1841. 
Great Egg Harbor, New Jersey, to the Bay of Fundy and Europe. 
NEROCILA MUNDA Harger, sp. nov. (p. 459.) 
Elongated, oval, smooth, and polished. Antennie and antennule nearly 
equal in length, about as long asthe head. Head flattened, about one- 
third broader than long, slightly narrowing anteriorly, produced and 
broadly rounded in front, subequally trilobed behind, the middle lobe 
largest. Eyes black, consisting of an irregularly rounded patch of 
rather indistinct ocelli visible both above and below. First thoracic 
segment longer than the others, excavated in front for the three lobes 
of the head; epimeral sutures of this segment indistinct, but the 
posterior lateral angles of the segment are somewhat produced and 
broadly rounded. The next three segments have this angle produced 
so as to become asmall tooth inthe fourth thoracic segment; in the last 
three segments it is much produced, becoming a long acute tooth in the 
seventh. The epimera of the second segment are rounded behind ; the 
remaining epimera are slightly angular behind, becoming more acute 
posteriorly ; those of the second, third, and fourth segments extend 
backward about as far as the segment to which they belong, but in the 
last three segments the produced angles of the segments surpass the 
epimera, so that the angle of the sixth segment nearly attains the end 
of the seventh epimeron. 
