504 



BULLETIN OF THE BUREAU OF FISHERIES. 





wide; first gnathopods in male stout, smaller than second; carpus not quite half as long as hand; hand 

 narrowly oval; palm uneven, very oblique, continuous with posterior margin; hand of second pair 

 oblong, with the two sides nearly parallel; palm oblique, with a laminate cross-striated edge which is 

 concave near the middle, a cluster of spines around the distal end. In the female the gnathopods are 

 of nearly equal size; hand of first pair subquadrate, with anterior margin quite convex; palm oblique 

 and quite evenly convex, with a few slender spines around posterior end; hand of second gnathopods 

 oblong, nearly rectangular; palm nearly transverse, evenly convex, with a few slender spines around 

 distal end, where it becomes more sharply curved; posterior margin of first three abdominal segments 

 produced backward in the mid-dorsal line into a prominent acute tooth; last three segments with 

 fascicles of spines; telson with three terminal and a few lateral spines on each division. 



General color olive green. A reddish spot above bases of first four abdominal appendages formed 

 as in Qammarus locusta. 



Length, 6 nun 



Cape Cod to Florida; Alabama ( Herrick); often in brackish water. 



Melita dentata (Kroyer). 



Gammarus purpuratut Stimpson, Marine Invert. Grand Manan, p. 55, 1853, 



Body much compressed; eyes round or oval; first antenna- much longer than second; second 

 joint of peduncle longer than first and about four times the length of third; secondary flagellum about 

 five-jointed; peduncle of second antennas long and slender; last joint a little shorter than preceding 



SfelUa dentata, male. Narxagansett Buy. 



one; flagellum shorter than peduncle; first four coxal plates deeper than their segments, the fourth 

 deeper than wide; first three with a small tooth at postero inferior angle; first gnathopods of 

 male with hand and carpus of subequal size, a dense tuft of very short seta? on posterior side of 

 merus and anterior side of carpus near distal end; hand oval; palm quite evenly convex, very oblique 

 and continuous, with posterior margin of hand above it, which it about equals in length; second gnatho- 

 pods of the male with a very large, strong hand, palm very oblique, with a large triangular tooth near 

 lower end and terminated above by a large spine tooth, the space between the two teeth convex in the 

 middle an. 1 armed with short spines. In the female the first gnathopods closely resemble those of the 

 male; carpus longer relatively than in the other sex and band of similar shape though smaller in size; 



