REPORT ON THE AMPHIPODA. 1153 



sculptured, at first continuing the hind margin of the hand by the sinuous outer margin 

 of a long tooth, within which three strong spaced palmar spiues are set on the surface, 

 the margin itself being pectinate with little spines for some distance ; beyond the tooth 

 is a cavity bordered with submarginal spinules, and followed by a smaller tooth leaning 

 rather towards the hinge, and to this succeeds a small cavity and a convex space pecti- 

 nately fringed and reaching to the hinge of the finger ; the finger is strong, curved, with 

 the central part of the inner margin cut into six decurrent teeth ; the tip of the nail 

 closes over on the side of the hand among the palmar spines. 



Second Gnathopods smaller than the first. The third joint with spines along the 

 distal border, and a group near the front margin ; the wrist longer than in the first 

 gnathopods, about as long as the hand, broad, except at the base, with numerous spines 

 at various points of both margins and on the surface ; the hand distally wider than the 

 wrist, the front and hind margins convex ; a few slender spines at various points of the 

 margins and surface, and three or four strong palmar spines where the hind margin curves 

 round to form the finely pectinate convex palm, over which the finger extends, closely 

 fitting it, with slightly denticulate inner margin. 



First Perzeopods. — The first joint nearly free from the side-plate, with three little 

 spinules on the slightly sinuous front margin, and one at the apex of the slightly convex 

 hind margin ; the second joint with a spinule at the apex of the hind margin ; the third 

 joint widening distally, with a spinule above the middle of the straight hind margin, a 

 spinule near the top of the front margin, and a spine a little way below it, the apex 

 rounded ; the fourth joint narrower and a little shorter than the third ; the fifth joint longer. 



Second Perzeopods similar to the first. 



Third Perzeopods. — The first joint very little widened; the third longer than the 

 fourth, scarcely as long as the fifth. 



Fourth Perzeopods with the joints longer than those of the third ; the first with five 

 spinules along the nearly straight front margin, and one or two on the very slightly 

 convex hind margin ; the second joint with a spinule at the apex in front ; the third joint 

 much longer than the fourth, as long as the fifth, with three spinules standing out from 

 the front margin, a spine at its apex, two spines on the hind margin on the upper half, 

 and a group on the rounded scarcely decurrent apex ; the fourth joint with a small spine 

 above the middle of the nearly straight hind margin, and a group at the apex of each 

 margin ; the fifth joint with spines at three points behind and four in front ; the finger 

 curved, acute, scarcely more than half the length of the fifth joint, the edges smooth. 



Fifth Perzeopods longer than the fourth, very similar. 



Uropods. — Peduncles of the first pair longer than the rami, carrying some marginal 

 spines, and having a spine-process on the lower apex, the outer ramus shorter than the 

 inner, both with marginal and apical spines ; the peduncles of the second pair about 

 equal to the inner ramus in length ; the outer ramus much shorter and narrower, and 



(ZOOL. CHALL. EXP. PAET LXVII. — 1888.) XxX 145 



