I90 REPORT OF NEW JERSEY STATE MUSEUM. 



transverse evenly convex palm with few slender spines around 

 distal end, wliere it becomes more sharply curved. Hind edge of 

 first three abdominal segments with edge produced backward in 

 mid-dorsal line into prominent acute tooth. Last three segments 

 with fascicles of spines. Telson with three terminal and few 

 lateral spines to each division. General color olive-green. Red- 

 dish spot above bases of first four abdominal appendages formed 

 as in Gainmarus locusta. Length to 6 mm. 



Remarks. — This species, originally described from Great Egg 

 Harbor Bay, rang-es south to Florida, and north to Cape Cod. 

 It frequently occurs in brackish water, as brackish pools on the 

 salt marsh and among the grass of the marshes. It is easily 

 distinguished from all our other related forms by haviiig the 

 anterior abdominal segments produced into a slender pointed 

 dorsal tooth. 



The numerous specimens I examined are from Point Pleasant, 

 the south side of Towmsend's Inlet and Corson's Inlet. I have 

 also met with it at Ocean City and Cape May. 



Genus GAMMARUS Fabricius. 



Scuds. 



Q(immarus Fabricius, Syst. Entomol., II, 1775, p. 418. Type Cancer locusta 

 Linnaeus, sixth species, designated by Boeck, Skand. Ark. Amphipoder, 

 1872, p. 364. 



Gamariis, auct. 



Gammarellus Herbst, Vers. Nat. Krab. Krebs., II, 1796, p. (2) 106. Type 

 Oniscits gammarellus Pallas, by tautonomy, twentieth species. 



? Paphredo Rafinesque, Amer. Month. Mag. Crit. Rev., II, November, 1817, p. 

 41. Type Pephredo poiamogeti Rafinesque, monotypic. 



? Sperchius Rafinesque, Annals of Nature, 1820, p. 6. Type Spherchhis lucidus 

 Rafinesque, monotypic. 



? Lepleurus Rafinesque, 1. c, p. 7. Type Leplcunts riviilar'is Rafinesque. mono- 

 typic. 



Body more or less elongated, and compressed, with back 

 usually evenly rounded, not carinated and segments of urosome 

 provided above with fascicles of spines. Cephalon without any 

 distinct rostrum, lateral corners rather broad, postantennal ones 

 distinct. Anterior pairs of coxal plates of moderate size, fourth 



