[571] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 277 



style ou the second pair of branchial plates in the male is straight, 

 slightl 3 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 nim . 



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.) 



Idoica triloba Say, loc. cit., p. 425, 1818. 



Great Egg Harbor, New Jersey to Vineyard Sound. 

 EPELYS MONTOSUS Harger. (p. 370.) 



Idotea montosa Stiinpson, Marine Invert., Grand Man an, p. 40, 1853. 



Bay of Fundy to Long Island Sound. 



COPIOSA Stimpson. (p. 315.) 

 Loc. cit., p. 40, PI. 3, fig. 29, 1853. J. nimlis 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, PI. 12, fig. 5. Cymotlwa llgnorum Rathke, Skrivt. 

 af Naturh. Selsk., vol. 101, t. 3, f. 14, 1799, (teste Bate and Westwood.) Lim- 

 noria tcrebrans Leach, Trans. Linn. Soc., London, vol. xi, p. 371, 1815. Gould, 

 Invertebrata of Massachusetts, p. 388, 1841. 



Great Egg Harbor, Xew Jersey, to the Bay of Fundy and Europe. 



KEROCILA MUNDA Harger, sp. nov. (p. 459.) 



Elongated, oval, smooth, and polished. Antenna} and antennulse nearly 

 equal in length, about as long as the 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 5 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 a small tooth in the 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. 



