AMPHIPODA OF SOUTHERN NEW ENGLAND. 



521 



Great Egg Harbor, New Jersey (Say); Connecticut to Bay of Fundy (Smith); Nova Scotia; 

 Labrador; Greenland; Spitzbergen; Norway. 



Ranges in depth from low tide mark to over 500 fathoms. Found in great abundance almost every- 

 where along the New England coast. 



This species in life is beautifully colored. The body is mottled with bright crimson; head with a 

 broad median band of crimson which is bifurcated in front: first segment of thorax more colored than 

 the others; a row of small crimson spots on either side of the mid-dorsal line; liases of both pairs of 

 antenna' crowned with orange; flagella with double rows of crimson spots, a pair to each segment; 

 large hand with crimson blotches.. 



Corophium cylindricum (Say). 



Antennae of nearly equal length in the female and about half as long as body; peduncle of first 

 pair with tirst joint rather stout, a little longer than second, and armed below with three or four 

 spines; third joint scarcely half as long as second; flagellum somewhat shorter than peduncle; 

 second antennae stout; very large in the male, the thick fourth joint produced into a large upturned 

 spine at distal end of lower margin, above which are two teeth; fifth joint aubcylindrical, scarcely 



Corophium cylindricum. Woods Hole, Mass. 



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, bearing 

 two curved terminal spines and numerous set;e; the second antenna? in the female with peduncle quite 

 different from that of the male, although the flagellum is much the same in both sexes; fourth joint 

 less stout relatively than in the male, devoid of large curved spine at distal end, and armed with two 

 or three large spines on lower side; in last joint lobe at distal end slight or absent and lower margin 

 armed with one or more strong spines; first gnathopods with carpus and hand of subequal size, the 

 former fringed behind with long plumose seta/; hand oblong; palm nearly transverse, rounded behind, 

 where it bears a prominent spine; several smaller spines near margin of palm; finger with a small 

 subterminal spine; second gnathopods with merue articulated below carpus as far as distal end of the 

 latter and fringed with two rows of very long, plumose seta-; propodus long, somewhat tapering, not 

 chelate, infero-posterior angle produced into a tooth; linger with one or two spines on lower margin 

 behind tip; first and second peneopods subequal, merus expanded to twice the width of succeeding 

 joints; dactyl slender, gently curved, about as long as propodus; fifth peneopods slender, nearly twice 

 the length of preceding ones, both margins of subovate basal joint with long, plumose seta?; propodus 

 nearly four times as long as the curved dactyl and furnished with a tuft of very long seta? at tip; tirst 



