REPORT ON THE AMPHIPODA. 1195 



margin, and an oblique row of four long ones on the surface near the apex ; the third 

 joint intermediate in length between the first and second, widening distally, with seven 

 pairs of long pectinate spines round the apical border, three spines a little below the 

 apex near the outer margin, and another set below these. 



Lower Lip. — The principal lobes rather narrowly, the inner lobes rather broadly, 

 rounded distally. 



First MaxillsB. — Inner plate not observed; outer plate with nine spines, none of 

 them stout or with strong lateral denticles ; two of the outermost appear to have three 

 small lateral denticles, and three of the shorter spines show each a single denticle on the 

 outer side ; the first joint of the palp short, the second reaching beyond the outer plate, 

 widening distally, on the dentate apical margin having four slender denticulate spine- 

 teeth, and a more slender spine (perhaps belonging to this series) at the top of the inner 

 margin ; there are three or four other slender spines on the surface. 



Second Maxillae resembling those of Platophium chelonise. 



Maxillipeds. — Inner plates broad, about reaching the distal end of the palp's first joint, 

 in armature nearly as in Platophium chelonise; the outer plates reaching beyond the 

 middle of the palp's second joint, with four distant spine-teeth on the crenate distal part 

 of the inner margin, and four or five other spines, forming the usual gradation, round the 

 serrate distal margin ; the palp nearly as in the species just mentioned, but the basal part 

 of the finger very short, only a little longer than broad, and carrying at the apex a 

 pectinate spine much more than twice as long as itself, besides a group of shorter spines, 

 which are also longer than itself. 



First Gnathopods. — The side-plates broader below than above, produced below 

 towards the front of the head in a narrow rounded point which carries a setule in a notch. 

 The first joint nearly free from the side-plates, very little longer than the wrist, widening 

 distally, the margins almost unarmed, except apically ; the second joint short, with a 

 group of long slender spines near the apex behind ; the third joint scarcely longer than 

 the second, the front and hind margins convex, the inner surface carrying some groups of 

 long spines and the hinder margin likewise ; the wrist a little longer and narrower than 

 the hand, narrowing distally, the front margin with spines at the apex and one or two 

 above it, the hind margin fringed with many long spines planted on or near it, the surface 

 also carrying some more remote from the margin ; the hand widening distally, the front 

 margin convex, with some strong spines at various points on and near it, the surface also 

 carrying spines at different points, the hind margin very slightly convex, smooth till near 

 the palm, then having a long spine followed by a short one, and at the apex a palmar 

 spine, which is succeeded by two or three others ; the palm forming an obtuse angle with 

 the hind margin is convex, pectinate, bordered with many submarginal spines, long and 

 short, and has close to the hinge of the finger an appearance of a laminar process or 

 broad tooth (not figured) ; the finger is short and broad, not reaching beyond the palm, 



