new Species of Antarctic Amphijiodi. -lo'} 



lialf as long again and li;ilt' as wlile as the fourtli, its I'lont 

 lnar;;in linely scrr.itt'. Dactjli as in pn-ceiling pairs. 



J'uHitli ami Jijlh pei-iiopods : Hist j(iint nano\v<'r tluui in 

 tlic tliird pair, an<l tlic IKuit margin of the fourth sniODth. 

 The fan rill pair are subeqnal to the third and about one fifth 

 hmifer than the fifth. Dactyli as in preceding pairs. 



First uropvds reaciiing to the end of the third, second a 

 little shorter. 



Third uropods : peduncles broad, one tliird longer than 

 the rami, wliich are subefjual, wide at the base, and acutely 

 pointed ; the outer edge of the outer ramus smooth, the rest 

 unecjualiy serrate. 



Telson eqiiilaterally triangular, barely reaching the middle 

 of the peduncle of the third uropods. 



This species in the length of the perjeopods and tlie relative 

 ]iroportions of the last three J)air3 approaches Farathemisto^ 

 ^\itil which it also agrees in the mouth-organs; but the 

 wiilely expanded and produced wrist of the first gnathopods 

 does not agree with eiliier G. O. Sars's or Bovallius's delini- 

 tion of that genus. 



Length 10 mu). 



Ihjperoche hiiilcenidcs^ sp. n. 



Lat. 57^ 25' 30" S., long. 151° \\\' E. ; one male: length 

 12 mm. 



Like Jlyperoche Lutkeni, Bovallius, except in the following 

 respects : — In the second |)air of peraiopods (fourth pair of 

 liovallius) tiie hind margins of the fourth and titth joints are 

 not aerrate. Li the third pair the fifth joint is curved. 



The telson is triangular, with rounded apex, rather lonjer 

 than the width at the base and reaching to the middle of the 

 pedunclis of the third uropods. 



The mandibular palp has the third joint almost as long as 

 the first and second united, as figured i>y Bovallius for 

 //. Lutheni. Li this respect both species differ from G. O. 

 ISars's figure of //. Kidt/erij Bov. [//. tauriformis (Sp. Bate 

 and Westwood)], in wliich the third joint is shorter than the 

 second. 



In the first pair of pera'0])ods the hind margin of the fourth 

 joint is prolonged in the form of a strong serrate tooth ; in 

 the second |)air the luoth is smaller ami not seirale, but the 

 curved portion of the end of the joint between the tooth and 

 the base of the fifth joint is so. 



