28o REPORT OF NZW JERSEY STATE MUSEUM. 



H. Richardson, Bull. U. S. Nat. Mus., No. 54, 1905, p. 263, figs. 276- 



277. Sandy Hook Bay, New Jersey (New York, Long Island Sound, 

 Great South Bay, Patapsco River, Bonday's Wharf, Baltimore, Chesa- 

 peake Bay, Tolchester, and Massachusetts to Florida). 



M. J. Rathbun, Occas. Papers Boston Soc. N. Hist., VH, 1905, p. 38. 



(Massachusetts and Connecticut.) 

 Cymotlwa triloba De Kay, N. Y. Fauna, Crust., VI, 1844, p. 46, PI. 10, fig. 40. 



New York (understood, from co'dfish). 

 ?Cyynothoa olivacea De Kay, 1. c, p. 47, PI. 10, figs. 41-413. New York 



Harbor (from Poronotus triacanthus) . 



Description. — Body ovate, broad, about one and two-thirds 

 longer than wide. Head broad as long, narrower in front than 

 behind and front widely convex. Eyes indistinct, small, placed 

 in hind lateral angles of head. Hind edge of head rounded. 

 First antennae formed of six or seven segments and reach front 

 lateral angles of first thoracic segment, but not to hind edge 

 of head. Second antennas formed of eight or nine segments 

 and reach hind edge of head. Maxillipeds with palp of two 

 segments. First five thoracic segments subequal, and sixth and 

 seventh also subequal, each a little shorter than any of preceding 

 segments. Epimera distinctly separated on all segments except 

 first, and comprise entire lateral edge in second, third, fourth 

 and fifth segments. In sixth and seventh segments hind ends 

 produced beyond hind edges of segments considerably. All six 

 abdominal segments distinct. Abdomen not immersed or set in 

 thorax, also not abruptly narrower than latter, and first 

 abdominal segment wide as seventh thoracic segment, though 

 segments gradually decreasing in width. Sixth or terminal 

 abdominal segment rounded behind. Uropoda not reaching end 

 of terminal abdominal segment, both branches of equal length 

 and similar shape. Outer branch of uropoda rounded behind, 

 about half width of inner, both branches of equal width through- 

 out their length, and inner branch obliquely truncate with 

 posterior lateral angles rounded. Legs all prehensile, with well 

 curved dactyli. No carina on basis of any of legs. Color pale 

 brown, and transverse yellowish band along posterior edges of 

 all segments. Epimera also yellow. Length 21 mm. 



Remarks. — A very familiar parasite on many of our larger 

 fishes, and ranging from Mississippi and Florida north to 



