REPORT ON THE AMPH1PODA. 1217 



has a single lateral denticle, one has some minute teeth, and one appears to be unarmed ; 

 the first joint of the palp is short ; the second joint widens distally and on the dentate 

 distal margin carries seven spine-teeth, and has seven sctiform spines submargiual to 

 these. 



Second Maxillse. — The outer aud inner plates nearly equal both in length and in 

 breadth ; the inner with twelve plumose setae in a series beginning near the base of the 

 inner margin and curving towards the outer apex, also having a series of spines beginning 

 below T the middle of the inner margin and passing most of the way round the apex ; the 

 outer plate with longer spines round the apex, except the three outermost which are 

 slight, the subapical series beginning a very little way down the inner margin. 



Maxillipeds. — The inner plates reaching beyond the first joint of the palp, having 

 plumose setae on the inner margin, three strong spine-teeth and several feathered spines 

 on the rather broad dentate distal margin, and a hooked spine-tooth near the apex of 

 the inner margin ; the outer plates reaching beyond the middle of the second joint of 

 the palp, the lower part of the inner margin smooth, though having the slender spines 

 on the surface projecting beyond it, the distal part gently crenate, set with six spine- 

 teeth, the distal margin almost truncate, serrate, with four spines, of which the outer- 

 most is setiform ; the first joint of the palp unusually short, with a setiform spine on the 

 inner apex ; the second joint long and slender, not very broad, with a setiform spine 

 on the outer apex, and many such spines along the inner margin ; the third joint twice 

 as long as the first, with spines round the inner and apical margins and on the distal 

 part of the surface and outer margin ; the finger slender, not so long as the third joint, 

 with a long spiniform nail and two setae at the base of the nail on the inner side ; the 

 dorsal cilium very long, close to the hinge. 



The triturating organs of the stomach do not appear to have any of the spines very 

 strong. 



First Gnathopods. — Side-plates below much broader than the depth, the lower 

 margin nearly straight, serrate, forming with the oblique front margin a strongly 

 produced acute angle. The first joint attached at the lower hind corner of the side-plate, 

 with spines along both margins, set at a little distance from the edge ; the second joint 

 short, with some spines at the apex behind, the third joint longer than the second, with 

 spines at four points of the straight hind margin, and groups across the distal margin, 

 some of the spines in which are both long and strongly pectinate on two edges ; the wrist 

 about as long as the first joint and except at the two ends much wider, the long front 

 margin slightly convex, having five or six groups of spines on it or closely adjacent ; 

 behind, the wrist attains its greatest width abruptly on leaving the third joint, and then, 

 at an angle with the smooth margin by which this is attained, the convex and irregularly 

 denticulate hind margin runs to the junction with the hand, the wrist gradually 

 narrowing, bordered with long and strong pectinate spines, and having others planted 



(ZOOL. CHALL. EXP. — PART LXVII. — 1888.) XxX 153 



