32 REV. T. R. E. STEBBING ON AMPHIPODA FROM 



longer thau the sixth, with many setse on both margins, those in front elongate ; the 

 sixth joint abruptly narrows distally, so as to leave no palm, carrying long setse in front, 

 more in the male than in the female, and a row of shorter ones at right angles to the 

 hind margin ; the finger is small, curved. 



Second gnatlioimds. The second joint is slender, curved at the base, the third longer 

 than the fourth, the fifth and sixth rather slender, subequal ; the curved finger impinging 

 against the sinuous hind margin of the sixth joint, which is armed with plumose setae. 



Third jyerceopods. The second joint is scarcely dihxted ; the fourth is not very wide, 

 acutely outdrawn below. 



Fourth i^erceopods. Second joint twice as broad as in the preceding pair, fourth joint 

 also larger. 



Fifth perceopods. Second joint longer and much broader than in the preceding pair, 

 subequal in length to the rest of the limb, broadly overlapping the third joint ; the fourth 

 joint rather wide, but much shorter than in the preceding pairs. 



Pleopods. Coupling-spines rather long. 



Length nearly three-tenths of an inch. 



Hub. New Zealand. A male and a female specimen received from G. M. Thomson, 

 Esq., F.L.S., the first describer of the species. A female specimen was also taken by the 

 ' Challenger ' Expedition. 



Earn. PHOXOCEPHALID^. 



PONTHARPINIA, n. g. 



1880. Urothoe Haswell, Proc. Linn. Soo. N. S. Wales, vol. iv. p. .^^o. 

 1891. Harpinia? Stebbing, Trans. Zool. Soo. London, vol. xiii. pt. 1, p. l. 



Back very broad, tapering to the rostrum and telson. Third pleon-segment setose on 

 the lower hind margin. Eyes small, lateral, set rather far back. Eirst antennae with 

 first joint tumid, second more slender, setose, third short ; accessory flagellum many- 

 jointed, more than half as long as the primary. Second antennae with the basal joints 

 of the peduncle short and stout; the penultimate long, broad, and setose; the ultimate 

 much shorter and nai'rower, but also carrying long setae ; the flagellum shorter than 

 the peduncle. Upper lip distally rounded, wide. Lower lip quadrilobate. Mandililes 

 with cutting-] )late and left mandible's accessory plate small, divided into a few 

 teeth ; spine-row of 8-10 spines, the first on the right mandible conspicuously the 

 largest (perhaps representing the accessory plate) ; molar small, prominent, tipped with 

 a few imeqtml spinules ; palp much longer than the trunk of the mandible, third 

 joint rather shorter than second, Avith many long setae near the base and the apex. 

 Eirst maxillae : inner plate small, carrying three short setae, outer with eleven spines, 

 very slight in size and armature; second joint of palp with 4 spinules and 4 setules 

 on truncate apex. Second maxillse : inner j)late shorter and narrower than the outer, 

 its armature not occujiying more than half the inner margin. Maxillipeds with the 

 plates narrow and not very long ; the outer scarcely reaching the middle of the long and 

 broad second joint of the palp, fringed with half a score of graduated spines ; the fourth 



