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



and broad, with ten spines on the truncate apical border, none of them stout, many of 

 them lonw, the innermost nearly straight, very minutely denticulate near the apex, the 

 next very short, four long ones in the middle curved at the apex, and having four 

 denticles below it, the rest shorter, with fewer denticles ; the first joint of the palp very 

 short, the trunk of the maxillae rising to a point which overlaps it on the outer side, the 

 second joint reaching far beyond the outer plate, with slender spines round the apical and 

 much of the outer and inner margins, together with rather long spine-teeth on the apical 

 margin. 



Second Maxillae. — Inner plates broadly oval, shorter and slightly broader than the 

 outer, the rounded apical margin crowded with spines, which also descend halfway down 

 the inner margin, at the lowest point being accompanied by long setae or setiform spines ; 

 the outer plate has spines at intervals along the inner border, closely set round the 

 apical, and of much diminished size along the distal half of the outer margin. 



Maxillipeds. — The inner plates small, reaching a little beyond the base of the first 

 joint of the palp, with several spines passing from the distal part of the inner margin 

 across the outer apex, the truncate apical border having three rather long spine-teeth ; 

 the outer plates very narrow, reaching a little beyond the first joint of the palp, with ten 

 spine-teeth along the serrate inner margin, including the longer two at the apex, which 

 is scarcely distinct from the line of the inner margin ; the first joint of the palp short, 

 with a pointed apex on the outer side, at and within which are several slender spines ; the 

 second joint long, narrowed at both ends, fringed on the inner margin with spines, and 

 having a few on the surface and on the distal part of the outer margin ; the third 

 joint shorter than the second, but much longer than the first, almost evenly broad 

 except at the narrow bent base, with groups of spines on the lower part of the outer 

 margin, along almost all of the inner margin, round the apical, and on both surfaces in 

 closer rows at some distance within the inner margin ; the finger narrow, much shorter 

 than the third joint, rather longer than the first, with a small dorsal cilium near the 

 base, a small cilium at the base of the minute nail, the inner edge finely pectinate. 



First Gnaihopods, — Side-plates narrow at the base, wide below, the front margin 

 running obliquely forwards, rounded below and scarcely indented, the hinder margin 

 indented but not serrate where it meets the lower margin. The first joint about as long 

 as the hand, a little dilated at the centre, fringed with spines or setae on both margins, 

 the second joint as long as the third ; the third with three or four groups of spines on 

 the hind margin, which is apically acute ; the wrist with a very short hind margin, 

 distal ly cup-like, behind produced and fringed with many rows of pectinate spines ; the 

 hand large, not twice as long as broad, broadest beyond the commencement of the palm, 

 which is very convex, set round with numerous slender spines or spinules of various 

 lengths, and defined by palmar spines, some of which, including one long one, are inserted 

 on the inner surface with a group of setae close by ; the fringing spines of the palm are 



