new Sjiecies of Antarctic yii/ijJiij'uJa. 151 



Second f/natho])ods : first joint as long ns the remainder ; 

 wrist and liand subequal, the latter elielate, with long plumose 

 seta; on the hind margin. 



Third penvopods : first joint oblong, with a median ridge 

 and five subequal teeth on the hind margin. In young 

 specimens these are fewer and unequal. 



Fourth percBopods : first joint rather wider than in the third 

 pair, with fewer and more unequal teeth ; posterior angle 

 acute and upturned. 



Fijih permopods : first joint wider than in the fi^urth pair, 

 with four unequal teeth on the hind margin and the posterior 

 angle still more acute and produced. 



Third uropods : rami widely lanceolate, the outer slightly 

 longer and wider than the inner, which is much longer than 

 the peduncle. 



Telson emarginate, the outer angles rounded, reaching the 

 end of the peduncles of the third uropods. 



Iphimedia longipes, sp. n. 



Coulman Island, 100 fath., 13/1/02 ; one specimen. 



Bod}/ : mesosome wide ; pleon and urus compressed. 

 First segment longer than the second, third, fourth, and fifth, 

 and subequal to the sixth ; seventh as long as the fifth and 

 sixth united, with two long subdorsal teeth directed back- 

 wards. The first side-plates rather deeper than the segment, 

 wider and rounded below; second and third bluntly pointed; 

 fourth sharply pointed below, with the hind margin produced 

 backwards in a spur; fifth and sixth with a short trigonal 

 spur ; seventh small and subquadrate. The first two pleon- 

 segments have each two long subdorsal teeth ; the lower 

 margin of the first is narrowed, with the posterior angle 

 obtuse ; the third segment is smooth, the posterior angle 

 forming a short blunt tooth with a longer curved tooth above 

 it. First segment of the urus dorsally depressed, much 

 longer than the remaining two united. 



Head exclusive of the rostrum longer than the first 

 segment ; rostrum as long as the rest of the head, defiexed 

 and pointed ; ocular lobe rounded in front and terminating 

 below in a strong tooth directed downwards. Eyes round- 

 oval, dark, widely separated. 



Upper anteiincB : first joint with a strong distal tooth on 

 the inner side reaching almost to the end of the second joint. 



First gnathopods with a chelate hand. 



Last three pairs of perceopods increasing in length succes- 

 sively, the last pair extending much beyond the ends of the 



