REPORT ON THE AMPHIPODA. 763 



hand aud wrist united, narrow at the point of attachment, then evenly wide, with one 

 seta at the middle of the front margin, aud a few minute setules ; the rest of the limb 

 almost as in Metoixi crenatipcdmata, but with fewer spines on the inner surface of the 

 wrist and hand, and the palm of the hand almost smooth. 



Second Gnatho2wds. — Side-plates broad, the hind margin a little sinuous, the lower 

 margin convex. Branchial vesicles very small, pear-shaped, much broader below than 

 above. First joint of the limb nearly as broad, but scarcely longer than the hand, with 

 small setules on the front margin, the hind margin having only an apical spinule ; the 

 second joint armed only at the hinder apex ; the third joint having one or two spines or 

 spinules on the hind margin and a small group on the bluntly-pointed apex ; the wrist 

 not longer than the third joint, distally cup-like, but narrow, furred behind, and 

 carrying a couple of spines on the apex ; the hand long and narrow, almost parallel- 

 sided, with four setules on the hind margin, which is produced into a tooth at the palm, 

 near to which is a group of palmar spines, among which the tip of the finger closes 

 down, not reaching the process of the hind margin ; the palm margin comparatively 

 short, but oblique, set with numerous spinules, apparently quite smooth ; the finger 

 much curved, not very long, its inner margin seeming to be quite smooth ; the dorsal 

 cilium near the base. 



First Pereeopods. — Side-plates evenly oblong, not broader than the preceding pair. 

 Branchial vesicles larger than the preceding pair, of more even width throughout, bent 

 near the base. First joint reaching beyond the side-plate, the limb in general scarcely 

 difi"ering from the corresponding limb in Metopa crenatipahnata. 



Second Perseopods. — These are similar to those in the species just named, with 

 trifling differences of detail ; the inner margin of the finger is smooth, not serrate. 



The Third, Fourth, and Fifth Pereeopods closely resemble those pairs in Metopa 

 crenatip)almata ; there is, however, more crenulation of the hind margin of the first 

 joint of the fourth and fifth pairs in the present species, and the finger of the fifth pair 

 has a smooth inner margin. 



The Pleopods appear to agree with those of the preceding species, or to have a joint 

 or two less in the rami. 



Uropods. — Peduncles of the first pair longer than the rami ; the rami of equal 

 length, the outer with two marginal spines, the inner with one, both with the upper 

 edges pectinate ; peduncles of the second pair not quite so long as the inner ramus ; the 

 outer ramus much shorter than the inner, without spines, the inner ramus with one spine, 

 both with pectinate upper edges ; the peduncles of the third pair not so long as the ramus, 

 the proximal portion of which is longer than the apical, and carries a small spine on the 

 inner margin and two spines at its apex ; the upper edge of both portions pectinate. 



Telso7i similar to that of the preceding species, rather narrower, wdth two spines on 

 the upper half of each lateral margin. 



