454 Mr. A. 0. Walker on 



Fam. Hjrperiopsidae, Bovallius. 

 Ilyperiopsis australis, sp. n. 



"\Y.Q. 16 6y 03, 15 f . ; one specimen. 



Differs from IJ. Voringiiy G. O. Sars (Norweg. N. Atlantic 

 Exp. p. 231), in the following points: — 



Tiie loner margin of the head is oblique. 



The first segment of the urosome has a deep dorsal depres- 

 sion ; tiie second segment is the longest of the three. 



The tiiird joint of the first and second per^eopods is not 

 quite twice as long as the next two united and is about the 

 same width (/. e. the margins are parallel) for the distal three 

 fourths of its length. 



In the last perteopods the jointing is indistinct ; the very 

 loni>- third (or fourth) joint is finely serrate and spinulose. 



The first and second iiropods are hiramous. In his defini- 

 tion of the genus Sars says that they are " simple, two- 

 jointed," but as the rami cling closely together this might 

 easily be an oversight. 



The single specimen was not dissected (nor, probably, was 

 Sars''s), but the maxillipeds are evilently of the Gammaiid 

 type. Bovallius has placed the genus in his tribe Sj'uopidea, 

 under the family Hyperiopsidee. 



Fam. Lysianassidae. 



Charcotia olesa, Chevreux, Bull. Soc. Zool. de France, Jan. 

 1906. 



I had written the description of the above under the genus 

 Socarnes, Boeck, from which genus it appears to differ only 

 in the structure of the branchiae, before M. Chevreux's paper 

 was published. 



Aristias antarcticuSj sp. n. 



AV.Q. ; two specimens: length of largest 15 mm. 



Body without carinse or teeth. Head .shorter than the first 

 segment, ocular lobe produced to the end (f the firnt joint of 

 the upjier arit^nnce, the angular apex rounded. JUi/es large, 

 dark, expanded below. Body-segments increasing in length 

 backwards. First four side-plates (except the first pair) 

 about as deep as the segments, the first concealed by the 

 second. Posterior angle of the third pleon-segment produced 

 and acute. First urus-segment depressed in front, almost 



I 



