1120 THE VOYAGE OF H.M.S. CHALLENGES. 



Fifth Perzeopods. — Side-plates smaller than in the preceding segment. The limb 

 scarcely differing from that of the fourth perseopods, but rather longer, especially with 

 respect to the first joint. 



Pleopods.— Coupling spines thin, with broad much-bent apices ; cleft spines four in 

 number on the first two pairs, three on the third pair ; the joints of the rami numbering 

 from fifteen to nineteen, the outer ramus rather shorter than the inner and curved. 



Uropods. — The peduncles of the first pair longer than the rami, with the usual 

 curved spine at the lower apex ; the outer ramus shorter than the inner, with four spines 

 on the outer margin, three at the upper part of the inner, and a group of five at the 

 truncate apex ; the inner ramus with three spines on the outer, six on the inner margin, 

 and the apical group ; the peduncles of the second pair reaching a little beyond those of 

 the first, not quite so long as the inner ramus, which has five spines on the inner margin, 

 three on the outer, and the apex as in the preceding pair; the outer ramus a little shorter, 

 with four spines on the outer margin, three on the inner and the apical group ; the 

 peduncles of the third pair longer than the rami, reaching much beyond the other 

 peduncles, having on the apical margin four little stout spines and three or four that are 

 setiform ; the outer ramus having on the straight outer margin a stout spine, and at the 

 broad apex two strong much-curved spines, the outer the broader, the inner the longer ; 

 the oval inner ramus has a spine near the middle of the inner margin, and about the apex 

 four short stout spines and a row of nine setiform spines of different lengths. 



The Telson is small, broader than long, much wider above than below, not nearly 

 reaching the end of the peduncles of the third uropods, the distal margin nearly straight 

 between the two acute corners, each of which carries a cilium ; on the surface a little way 

 from each apex is a long seta or setiform spine, and there are two setse on each lateral 

 margin near the centre. 



Length. — The specimen, in the position figured, measured, in a straight line from the 

 front of the head to the extremity of the uropods, rather over one-fifth of an inch. 



Locality. — The single specimen, a female, was obtained at Kerguelen Island, whence 

 the specific name. 



Amphithoii fiindersi, n. sp. (PI. CXVIII.). 



Rostrum inconspicuous, lateral lobes of the head little prominent ; the postero- 

 lateral angle of the first three pleon-segments more or less rounded, but with a little 

 notch where the curve of the hind margin meets that of the lower margin ; the fourth 

 segment with a transverse dorsal depression. 



Tlie Eyes oval, small, with many small ocelli, the position rather horizontal than 

 vertical. 



Upper Antennse. — The first joint rather thick, more than twice as long as broad, 



