THE CRUSTACEA OF XEW JERSEY. 177 



Several species in the northern and southern hemispheres. 

 Characterized largely by the stout depressed body, very strongly- 

 built pediform inferior antennae, and the peculiar structure of 

 the gnathopoda. 



Corophium cylindricum (Say). 



PtATE 52. 



Podoceriis cylindrkus Say, Journ. Acad. Xat. Sci. Phila., I, pt. 2, 1818, p. 387. 

 Egg Harbor, Nezu Jersey. 



De Kay, X. Y. Fauna, Crust., VI, 1844, p. 39 (on Say). 



Bate, Cat. Amph. Crust. Brit. Mus., 1862, p. 256, PI. 44, fig. 4 (Say's 



record; part). 



Corophium cylindricum Verrill, Rep. U. S. F. Com., I, 1871-72 (1873), p. 



370. Among eel-grass. (Vinej-ard Sound.) 

 S. I. Smith, Rep. U. S. F. Com., I, 1871-72 (1873), p. 566. New Jersey 



to Vineyard Sound. 



Holmes, Amer. Xat., XXXVII, 1903, p. 288. Cape Cod to Cape Hat- 



teras region. 



Holmes, Bull. Bur. Fisher., XXIV, 1904 (1905), p. 521, figs. New 



Jersey to Provincetown, Massachusetts. 



Paulmier, s8th An. Rep. N. Y. State ;Mus., IV, 1904 (1906), p. 167, fig. 



27. Along the shore of X. Y. City. 



Description. — Antennas of nearly equal length in female, about 

 half as long as body. Peduncle of first pair of antennae with 

 first joint rather stout, a little longer than second, and armed 

 below with three or four spines. Third joint scarcely half as 

 long as second, and flagellum somewhat shorter than peduncle. 

 Second antennae stout, very large in male with thick fourth 

 joint produced into a large upturned spine at distal end of lower 

 margin, above which two teeth. Fifth joint subcylindrical, 

 scarcely half as thick as preceding one, distal end produced into 

 a lobe on one side. Flagellum shorter than preceding joint of 

 peduncle, three-jointed, first joint longer than second, third joint 

 minute, bears two curved terminal spines and numerous setae. 

 Second antennae in female with peduncle quite different from 

 that of male, although flagellum much the same in both sexes. 

 Fourth joint less stout relatively than in male, devoid of large 

 curved spine a distal end, and armed with two or three large 

 spines on lower side. In last joint lobe at distal end slight or 



12 MU 



