926 THE VOYAGE OF H.M.S. CHALLENGER. 



and is succeeded on the apex by a small spine or spine-like cilium, of which there are 

 three more along the inner margin ; along this inner margin there is a hairy strip of the 

 surface ; the outer plate carrying on its truncate distal border eleven spines variously 

 denticulate, the innermost the longest, the next much shorter, with the denticulation on 

 the outer side ; the second joint of the palp reaching beyond the outer plate, its distal 

 margin cut into strong sharp teeth, between which are inserted six spine-teeth with 

 serrate edges, the outermost the longest ; four or five setiform spines are inserted on each 

 surface just below the teeth. 



Second Maxillse. — The inner plate a little shorter and narrower than the outer, with a 

 row of six plumose seta? on the surface, beginning below the centre of the inner margin ; 

 twelve or fourteen spines partially fringe the rounded apex and apical part of the inner 

 margin ; longer spines, plumose or pectinate, fringe the distal margin of the outer plate, 

 increasing as usual towards the outer corner, and then followed by some short ones. 



Maxillvpeds. — Inner plates scarcely reaching so far as the distal end of the first joint 

 of the palp, with plumose setae on the inner margin, some small teeth (probably the 

 usual three) and curved spines on the truncate distal margin ; outer plates small, reaching 

 beyond the middle of the second joint of the palp, inner margin slightly serrate, without 

 teeth, with seven groups of slender, not acute, spines, inserted on the outer surface in 

 pairs, except the lowest, which is solitary ; beyond the rounded apex the distal border is 

 armed with two plumose spines, followed by two plumose setae ; the first joint of the 

 palp is short, with two setae on the inner and one on the outer apex ; the second joint, 

 twice as long as the first, is fringed with setae on its inner and oblique apical margin, 

 with a group at the outer apex, and one on the outer margin below the apex ; the third 

 joint is longer than the first, being distally prolonged in a sort of triangular cap with 

 ciliated edges over the base of the finger, the distal part of the inner margin is fringed 

 with setae, there is a small one in the middle of the hind margin, a group at the base of 

 the cap, one near the tip of the cap, and some serrate spines near its base ; the dorsal 

 cilium of the finger is at some distance from its base ; a group of three cilia is planted 

 near the base of the long and large nail. 



First Gnathopods. — Side-plates not very deep, wider below than above, slightly 

 produced forwards, with some cilia along the lower margin, which is serrate towards the 

 hinder angle. The first joint reaching beyond the side-plate, with some small spines 

 along the margin ; third joint rhomboidal, with two pointed apices, a group of 

 spines on the lower margin, a few spines higher up, and the distal half of the hind 

 margin lightly furred ; the wrist as long as the hand, with groups of serrate spines on 

 the hind margin and the free slope of the distal margin, the long front margin having 

 spines at the apex ; the hand more than twice as long as broad, widest at the 

 palm, which is straight, slightly oblique, set with setules of various lengths, and 

 defined by a group of stout spines of various lengths, and carrying a small plumose seta 



