AMPHIPODA — STEBBING. 587 



bates a crenulate border. The palp is very slender, the first 

 joint much broader than the third and nearly as long, their com- 

 bined length not equalling that of the second joint. The lower 

 lip has the priuci])al lobes acute, the inner coalesced lobes 

 rounded, the mandibular processes large. The first maxillje have 

 an elongate palp overtopping the outer plate, of wliich the apical 

 margin is very oblique, furred with setules below the ten mostly 

 denticulate spines, while the well developed inner plate carries 

 only six setfe. 



The slender first gnathopods have the flexuous second joint and 

 general character as in /. obesa, but are strongly distinguished 

 by the great length of the third and fifth joints, each of which is 

 subequal in length to the sixth, including its delicate chela- 

 forming thumb. The second gnathopods and the peraeopods 

 difi'er little from those of /. obesa. The third pair have the second 

 joint more strongly serrate on the hind margin than in the species 

 compared. The marsupial plates are very broad on the second 

 peraeopods, but not so on the other limbs to which they belong. 



The telson has the sides convex, with a shallow concave eniar- 

 gination of the apical border flanked on either side by a little 

 tooth with an intervening spinule. In /. longipes, Walker, the 

 telson is rather deeply notched, besides that the animal is ten 

 times as long as the present. 



Length of adult female about 3 mm. For the same sex Sars 

 gives the length as reaching 12 mm. in /. obesa. 



It may be observed that in the relative dimensions of the 

 peraeon segments and in the character of the mandibular palp 

 this species agrees with Bate's /. eblance, which in " Das 

 Tierreich " I have transferred to Panoploea, Thomson, along with 

 species in which the palp of the first maxilla does not reach the 

 apex of the onter plate. 



Locality.— OS Wa-tsi Mooli, from depth of 54-59 fathoms. 



Famzfy LILJEBORGIIDx?^]. 



Liljeborgiidce, Stebbing, Ann. Mag. Nat. Hist., (7), iv., 1899, 



p. 211. 

 Liljeborgiidce, Stehhing, Das Tierreich, xxi., 1906, p. 229. 

 Lilljeborgiidce, Walker, IS at. Antarctic Exp., iii., 1909, pp. 5, 35. 

 Lilljeborgiidce, Chevreux, Mem. Soc. Zool. Fr., xx,, 1908, p. 475. 



The character assigned to this family, that the pleon has one 

 or more of the segments dorsally dentate, should have been 

 qualified by the adverb usually, since the sjiecies LHjeborgia 

 aequabilis, described in 1888, forms an exception, though in other 

 respects clearly inseparable from the t} pical genus. 



