REPORT ON THE AMPH1PODA. 1(301 



inaudible similar to the principal, but without the produced tooth ; the little process behind 

 the cutting plate on the right mandible extremely minute ; palp wanting in the female. 



Lower Lip and Maxillae appear to be represented but they are difficult to determine. 



MoxiUvpeds strongly bent. 



First Gnotkopods. — The first joint little longer than the wrist and not half as broad ; 

 the second joint broader than long; the third widening distally, rather longer than 

 broad, with a spine at the apex of the hind margin ; the wrist very large, broadest at 

 the base of the hand, longer than broad, the hind margin longer than the front, carrying 

 a few small spines, the broad process not so long as the proximal part of the wrist, nor 

 reaching quite to the extremity of the hand, its front or inner margin cut into several 

 teeth and bordered on each surface with a thick brush of spines, the apical tooth much 

 the longest, the short hind margin of the process having one tooth between the long 

 apical tooth and the short tooth which forms the apex of the hind margin proper; the 

 hand is shorter than the front margin of the wrist, with numerous spines on both 

 surfaces, most numerous distally and near the hind margin ; the hind margin nearly 

 straight, toothed and serrate, the apical tooth the largest, produced some way along the 

 finger ; the finger slender, a little curved, scarcely half as long as the hand, having a 

 small tooth at about the centre of the hind margin. 



Second Gnathopods. — The first three joints nearly as in the first pair, the wrist of 

 similar type but with the proximal part much more elongate, the hind margin continuous 

 to the long apical tooth, and the inner margin of the process cut into about fifteen teeth 

 which are larger and much closer together than those in the first pair, with comparatively 

 few spines on the adjacent surface ; the hand reaches a little beyond the process of the 

 wrist, but is very much shorter than the front margin ; it has spines as in the first pair, 

 and the hind margin is cut into a dozen close-set decurrent teeth, resembling those of the 

 wrist ; the finger is slender, bent, more than half the length of the hand, having a tooth 

 near the centre of the hind margin. 



First, Second, Third, and Fourth Per&upods. — There are numerous spinules along 

 the hind margin of the third, fourth, and fifth joints in the first and second pairs ; the 

 second pair are the longer ; the third pair are longer than the second, and have the 

 same joints furnished along the front with spinules ; the shorter fourth pair have the 

 third joint pectinate with short straight teeth, the fourth with longer straight teeth, the 

 fifth with unequal decurrent teeth, the finger finely pectinate. The side-plates of the 

 third pair have on the inner side a narrow tongue-like process pointing directly back- 

 wards. 



Fifth Per&opods. — Side-plates with rounded front angle, only the hinder half dis- 

 joined from the segment, this half shallow, with the upper and lower margins nearly 

 straight and parallel. The first joint slender, pear-shaped, somewhat longer than the 

 first in the preceding pairs and rather longer than the remaining joints together, apically 



(ZOOL. CHALL. EXP, — PART LXVII. — 1888.) Xxx 201 



