76 "TERRA NOVA" EXPEDITION. 



That there are only three of them, all previously described, is in agreement with 

 what is known of the poverty in Decapoda of Antarctic waters. Chorismus antarcticus 

 has already been reported in the Ross Sea, as well as in South Georgia and to the south 

 of Kerguelen. It has thus an Antarctic circumpolar distribution, extending as far north 

 as South Georgia. The same is true of Crangon antarcticus, with the difference that 

 specimens of this species taken between 80° E. and 160° W. long, belong to a different 

 variety from those of South Georgia, on the opposite side of the Antarctic region. These 

 two species are the only Decapoda reported from South Georgia, so that, so far as this 

 evidence goes, that island clearly belongs to the same geographical province as the 

 Antarctic continent, and not to the adjoining South American region. I have discussed 

 below the affinities of Crangon antarcticus and its bearing upon the bipolarity theory. 

 Pasiphaea longispina was taken near Kaiser Wilhelm Land by the German expedition. 

 Very probably it is also circumpolar. Two other species of Pasiphaea, recently 

 described by Stebbing, but not obtained by the " Terra Nova," make up to five the 

 total number of Antarctic Decapoda at present known. 



(2) The New Zealand species were : 



Solenocera novae-zealandiae, n. sp. 



Sergestes semiarmis, Bate, 1888. 



Leucifer hatei, Borr., 1915. 



Thalassocaris novae-zealandiae, n. sp. 



Rhynchocinetes typus, H. M.-Edw., 1837. 



Tozeuma novae-zealandiae, n. sp. 



Periclimenes [Hamiger) novae-zealandiae, n. sp. 



Aegean cataphractus (Olivi), 1792. 



Jasus, sp. 



Arctus immaturus. Bate, 1888 (? sp.). 



Axius novae-zealandiae, n. sp. 



Galathea pusilla, Hend., 1885. 



Uroptychus maori, n. sp. 



,, novae-zealandiae, n. sp. 



Paguristes subp)ilosus, Hend., 1888. 

 Eupagurus norae, Chilton, 1911. 

 hirki, Filhol, 1885. 



,, crenatus, n. sp. 



Porcellanopagurus edioardsi, Filhol, 1885 (? sp.). 

 Portunus corrugatiis (Penn.), 1777. 

 Pilunmus maori, n. sp. 

 Pinnotheres pisum (L.), 1766. 

 Gi^a^ysus {Leptograpsus) variegatus (Fabr.), 1793. 

 Plagusia chabrus (L.), 1764. 



