THE CRUSTACEA OF NEW JERSEY. 189 



Carinogammarus mucronatus (Say). 

 Plates 55 .\xd 150. Figure 6. 



Gammarus mucronatus Say, Journ. Acad. Nat. Sci. Phila., I, pt. 2, 1818, p. 



376. Bay of Egg Harbor, Nciv Jersey. Near month o{ St. John's Riv(^r, 



Florida. 



De Kay, N. Y. Fauna. Cnist., VI, 1844. ?• 3,7, New Jersey to Florida. 



White, Cat. Crust. Brit. Mus., XXV, 1847, p. 89. Egg Harbor, New 



Jersey (Say's material). 



Verrill, Rep. U. S. F. Com., I. 1871-72 (1873), P- 466 (brackish 



pools) ; p. 479 (in eel-grass) ; p. 520, Great Egg Harbor, N. J. (in 

 Lophopsetta macula ta). 



S. I. Smith, Rep. U. S. F. Com., I, 1871-72 (1873), p. 559. North Caro- 



lina to Cape Cod. 

 Gammaracanthus mucronatus Bate, Cat. Amph. Crust. Brit. Mus., 1862,, p. 



203 (copied Say). 

 Carinogammarus mucronatus Holmes, Amer. Nat., XXXVH, 1903, p. 280. 



Cape Cod to Cape Hatteras. 

 Holmes, Bull. Bur. Fisher., XXIV, 1904 (1905^, P- 503. fig'^- Cape 



Cod to Florida and Alabama. 



Paulmier, 58th An. Rep. N. Y. State Mus., IV, 1904 (1906), p. 161, 



tig. 30. Along the shores of N. Y. City. 



Description. — Body long, well compressed, and abdomen cari- 

 nated dorsally. Eyes reniform. First antennae little longer than 

 second, first joint of peduncle longer than second, and third joint 

 about three-fifths length of preceding. Flagellum nearly twice 

 peduncle length. Secondary flagellum not half peduncle length, 

 of three joints. Second antennas with flagellum about equal to 

 peduncle, of about ten oblong joints. First four coxal plates 

 deep, first oblong and similar to second and third in shape, 

 fourth deeper than wide. First gnathopoda of male stout, 

 smaller than second. Carpus not cjuite long as hand, latter 

 narrowly oval with very oblique uneven palm continuous with 

 posterior margin. Hand of second gnathopod oblong, both 

 sides nearly parallel, oblique palm with laminate cross-striated 

 edge concave near middle and cluster of spines around distal end. 

 Female gnathopoda nearly equal in size, hand of first pair sub- 

 quadrate with anterior edge quite convex and oblic|ue, palm quite 

 evenly convex, with few slender spines around posterior end. 

 Hand of second gnathopods oblong, nearly rectangular, nearly 



