AMPHIPODA OK THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 207 



Oradarea longimana W;ilker, 1907, p. 32. 



,, Clii'vreux, 1906u, p. 54. 



Leptamphopvx novte-eealandia Stcblmig, 1906, pp. 294 and 727. 



Chilt.m, 1909A, p. 621. 



South Orkneys, Scotia Bay, Station 325. 1903. A few specimens. 

 This species is widely distributed in Antarctic and sub- Antarctic seas. It very 

 closely resembles Djerboa furcipes, except in the telson, which is undivided. Fuller 

 details concerning it will be found under the last reference given above. 



Genus HALIRAGOIDES 0. Sars, 1893. 

 Ilaliragoid.es australis, sp. nov. 



South Orkneys, Scotia Bay, Station 325; 9-10 fathoms. May 1903. A few 

 small specimens, about 3 mm. long ; all very delicate and fragile. 



The specimens are almost too delicate and fragile to allow of a full description, but 

 there is no doubt that they belong to this genus, and that they come pretty close to 

 H. ine)*mis (0. Sars) from the northern seas. They appear to differ in having the first 

 and second segments of the pleon slightly produced backwards into a small dorsal 

 tooth ; the postero-lateral angle of the third pleon segment is produced to a small acute 

 tooth. The head has a more distinct rostrum curving considerably downwards ; the eye 

 is large, well-developed, oval, but colourless in spirit specimens. The first gnathopod 

 differs in having the propod somewhat narrowed at the base and the palm slightly 

 shorter than the hind margin. In all other points that can be observed the specimens 

 seem to be very close to H. inermis. 



The occurrence of this species at the South Orkneys adds another to the list of 

 cases where a northern species of a genus is represented in the south by the same species 

 or by one closely allied. 



Genus Eusmus Kroyer, 1845. 



In order to make clear what is now known about the species of Eusirus from 

 sub- Antarctic seas it seems desirable to give the following historical account : 



In 1880 G. M. THOMSON identified specimens from New Zealand with the northern 

 species E. cuspidatus Kroyer, but distinguished them as a new variety, antarctica. 



In 1888 STEBBING examined two specimens collected by the Cli<iUcntjer, one 

 from Kerguelen and the other from Heard Island, and referred them to E. longipes 

 Boeck, another northern species, saying that they were distinguished from 

 E. cuspidatus by the absence of the spine-teeth from the apex of the second joint 

 of the maxilliped palp. 



In 1893 SARS in identifying specimens from the Lofoten Isles with E. longipes gave 

 the points which he considered distinguish it from the other species, and said that the 

 form recorded under this name from the Challenger Expedition is scarcely identical 

 with BOECK'S species. 



(ROY. soc. KHIX. TI:ANS.. VOL. XLVIII , 4s!i.) 



