REPORT ON THE AMPHIPODA. 615 



fringed than the corresponding joint of the first gnathopods ; second joint longer than 

 third, fringed in front and at the lower hinder angle ; third joint rather densely furred 

 behind, clasping the next joint closely with its dilated distal part, the hinder angle of 

 which carries numerous long setiform spines, distally pectinate ; the wrist elongate, much 

 longer than the hand, densely furred on both sides, carrying spines similar to those of the 

 preceding joint at the front apical angle and along the distal part of the hinder margin ; 

 the hand narrow, densely furred, surrounded on both margins with pectinate spines of 

 various lengths, many both long and short at the jDoint where the minute finger hinges. 



Second Peraeopods. — Side-plates a little deeper than the preceding, as those of the 

 third segment are, compared with those of the second. The branchial vesicles are not 

 pleated. The marsupial plates are long and narrow, with a row of small cilia on one 

 border, the usual long smooth set^e on the other and round the apex. First joint tolerably 

 stout and long, with a bunch of setse at each apical angle, and very little other furniture ; 

 second joint short, with some setse on the hinder margin, chiefly the group at the lower 

 hinder angle ; third joint longer and very much stouter than the following, a little 

 j^roduced downwards in front, fringed behind with several small groups of setse ; fourth 

 and fifth joints narrow, the latter the longer, narrowing a little distally, both bordered 

 behind with numerous setaj, the fourth joint showing also two spines near the base, the 

 fifth joint having twelve or thirteen in a series extending along its whole margin ; the 

 finger short and much curved. 



Tliird Perieopods, — Side-plates rather broader below than above, and front margin 

 slightly more convex than the hinder. First joint subequal in extent of surface to the 

 side-plate, narrower below than above, front margin fringed with spines, hind margin 

 serrate, the rounded distal portion overlapping the short second joint ; two or three short 

 spines and one long one on the front margin of the second joint; the same number on the 

 hind margin of the third joint, which is short, dilated, slightly produced downwards 

 behind, and has a row of spines and fine setse on its front margin; fourth joint somewhat 

 dilated, narrower and longer than third; fifth joint much narrower and rather longer than 

 fourth, both with spines on front margin. Finger small, curved. 



Fourth PeriBopods. — First joint longer and more oval than that of preceding pair, 

 rather narrower below than above; third joint much longer than in preceding paii-, broader 

 and shorter than the fourth joint, which in its turn is a little broader and shorter than the 

 narrow fifth joint ; armature of the various joints, and the finger, as in the preceding pair. 



Fifth Per^ojwds like the fourth pair, not longer. 



Urop)ods. — Peduncles of the first pair longer than the rami, which are narrow, curving 

 at the tips ; the outer a little longer than the inner, with a row of seven spines on the 

 inner margin, ceasing some distance from the apex; the inner with a similar row of ten 

 spines. Peduncles of the second pair (PI. V. ur. 2.) shorter than those of the first pair, 

 subequal in length to the longer ramus ; outer ramus considerably longer than inner, a 



