REPORT ON THE AMPHIPODA. 865 



the preceding pair, but rather shorter, with six groups of strong spines on the front 

 margin. 



Fourth Perwopods. — The front margin of the side-plates almost straight, shorter than 

 the hind margin, the lobe behind resembling that in the third perseopods. The first 

 joint rather shorter than in the preceding pair, but more dilated behind near the base ; 

 the limb in other respects like the preceding. 



Fifth Perwopods. — Side-plates small, not bilobed. First joint shorter than in the 

 preceding pair, more expanded above, other details similar. 



Pleop>ods. — The coupling-spines with two lateral retroverted teeth, the apical tooth 

 seemingly double, bent, but not downwards ; the cleft spines on the first pair nine in 

 number, with seven or eight plumose setae on the margin above them, and as many on the 

 same joint below them ; the joints of the outer ramus thirty-eight, of the inner thirty- 

 four ; the peduncles carrying numerous setse. 



Uropods. — The peduncles of the second pair reach back just beyond those of the first 

 pair, and those of the third just beyond those of the second; the peduncles of the 

 first pair longer than the rami, the rami lanceolate, the outer a little shorter than the 

 inner, which it partially clasps, the marginal spines small ; the peduncles of the second 

 pair rather shorter than the longer ramus, the rami similar to those of the preceding pair, 

 but reaching rather beyond both those and the third pair ; the peduncles of the third 

 pair much shorter than the rami, which, as in the other pairs, are broad, lanceolate, the 

 outer shorter than the inner. 



Telson subequal in length to the peduncles of the third uropods by which it is closely 

 clasped, longer than broad, slightly narrowing distally, the distal end slightly emarginate. 



Length. — The specimen is figured life-size at the top of the Plate. From the lateral 

 lobe of the head to the dorsal apex of the first pleon-segment is nine-tenths of an inch ; 

 the total length without the antennae may be considered to be an inch and a half, the 

 imperfect upper antennae measure seven-tenths of an inch. 



Locality. — Station 184, between Australia and New Guinea, August 29, 1874; 

 lat. 12° 8' S., long. 14.5° 10' E.; depth, 1400 fathoms ; bottom, Globigerina ooze ; bottom 

 temperature, 36°. One specimen, female. Trawled. 



Remarks. — The specific name refers to the great distance between the habitat of the 

 present species and that of the two earlier known species of the same genus, which are 

 both Arctic. From the type-species, Amathillopsis spinigera, Heller, the present is 

 distinguished by the palp of the mandibles, which in Heller's species has the third joint 

 shorter than the second, by the absence of dorsal processes on the first four segments of 

 the peraeon, and the fourth of the pleon, by the shape of the side-plates, and by the 

 peduncles of the third uropods, which in Heller's species are double the length of the 

 telson. From Amathillop)sis affinis, Miers, it is distinguished by the absence of dorsal 



(ZOOL. CHALL. EXP. — PART LXVII. — 1887.) Xxx 109 



