636 THE VOYAGE OF H.M.S. CHALLENGEE. 



in a parallel row ; the second joint of the over-arching palp distally furnished with 

 twelve teeth and a seta, in the maxilla examined. 



Second Maxillse. — The inner plate with almost its whole inner margin fringed 

 with plumose setiform spines ; the outer plate over-topping the inner, its apical border 

 fringed with pectinate spines ; both plates furred with cUia. 



Maxillipeds. — The inner plates scarcely reaching as far as the apex of the first joint 

 of the palp, furnished with the usual setae on the inner margin passing round to the 

 outer apical corner, and three teeth on the apical margin ; the outer plates reaching 

 some way beyond the second joint of the palp, carrying ten teeth on the inner 

 margin, slightly increasing in length to the apex ; a few small spines within the 

 border ; the curved outer and apical margin clean. The first two joints of the palp 

 equal ; the third joint shorter ; the finger much shorter than the third joint, with some 

 cilia on the inner side near the nail. 



First Gnathopods. — These approach closely to the form described for Hippomedon 

 hergueleni. The hand and wrist are equal in length ; the hand widens a little 

 distally, and the finger closes very exactly over the sloping convex palm, which the 

 tip of the finger conspicuously overlaps, without any distinct tooth on its inner side ; 

 the palm being defined by some slender spines. There is no sign here of any furring 

 of the hinder border of the third and fourth joints as in the species just mentioned, 

 and in some other respects, as the figures show, they are somewhat diflferently 

 furnished. The margins only must be compared in the figures, as of the present 

 species it is the inside, not, as usually, the outside of the hand that has been repre- 

 sented. 



Second Gnathopods. — In general appearance these are scarcely distinguishable 

 from those of Hij^pomedon hergueleni; distally the wrist is a little fulled out, with 

 short, bent spines or scales on the breast, that is, the postero-distal portion. 



First and Second Perseopods as in Hip>po'medon hergueleni, with the upper part of 

 the side-plate of the second pair somewhat broader and less elongate. 



Third Perseopods. — Branchial vesicle much folded. First joint narrowed distally, 

 much more prominently spined on the front border than in the species above mentioned ; 

 fourth joint widest proximally, not ovate ; fifth joint much longer than fourth, both 

 armed with rows of long and short spines. Finger long and slender, a little curved at 

 the tip, naked except for the dorsal cilium near the base. 



Fourth Perseopods. — Branchial vesicle as usual much smaller than in the preceding 

 pair, on one side of the specimen ending in a narrow sinuous sac, but on the other side 

 more dilated. First joint a long oval, most of the upper half of the front margin free 

 from spines ; third joint but little dilated ; rest of the limb missing. 



Fifth Perseopods. — First joint longer and broader than in the preceding pair, 

 front margin rather sinuous, the concavity about the middle, upper half with only two 



