60 ME. A. O. WALKEE ON AMPHIPODA 



Veiy near A. carinatits, from which it differs in the carina and 

 hind margin of the third metasome-segment, the leugth of the 

 rostrum, size of eyes, 1st joint of the last perseopods, proportions 

 and armature of 3rd uropods, form of telsou, &c. It is never- 

 theless very remarkable that two forms — the one a strictly Arctic 

 species — should be found at opposite poles, when not one other 

 species of the genus, as restricted by G. 0. Sars, has, so far as I 

 know, been found elsewhere, unless, as suggested by G. 0. Sais, 

 Atylus Hucoleyanus, Sp. Bate {Halirages JELuxleycmus in the 

 ' Challenger ' Amphipoda), ought to be referred to it. From this 

 species A. antarcticus differs considerably more than it does from 

 A. carinatus. 



BovalUa gigantea^ Pfeffer, Krebse v. Siid-Georgia, is also 

 nearly related to this species, from which it differs in the keels 

 on the segments, which in Atylus antarcticus begin on the 5th 

 and in Bovallia on the 6th segment ; also in the form of the eye 

 and telsou, in the armature of the peduncle of the upper antennse, 

 and probably in other respects. The 3rd segment of the meta- 

 some is not described by Dr. Pfeffer. 



Pam. Gammaeidje. 



Genus LiLJEBORGiA, Sp. Bate, 1862. 

 L. Haswelli, Stehhing, 'Challenger' Amphipoda, p. 985, pi. 92. 

 Eusirtis dubms, Haswell. 



Pour specimens. Cape Adare, 26 fath., Dec. 1, 1899. 

 Length of largest 20 mm. 



The specimens agree with Mr. Stebbing's description except 

 as to the armature of the hind margin of the segments of the 

 raesosome and metasome, which varies with the age of the indi- 

 , vidual. The ' Challenger' specimen was from Bass Straits. 



Pam. PnoTiDiE. 



Genus Haplocheiea, Haswell, 1880. 



H. PLUMOSA, Stebhing, ' Challenger ' Amphipoda, p. 1172, 

 pi. 126. 



Cape Adare, Nov. 4 & 26, 1899 ; 26 fath. Prauklin Island, 

 10-24 fath., Peb. 9, 1900. 



Several specimens. Length 6 mm. 



