AMPHIPODA 



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the sub-Antarctic Zone towards the Falkland Islands. It is confined to the upper layers, 

 both the cold Antarctic surface layer and the sub-Antarctic surface layer across the line 

 of Convergence. The following is a statement of its occurrence : 



This species has not been taken in the Antarctic before. Barnard (1932) writes: " It 

 is extremely interesting to find this boreo-Arctic species appearing in the South Georgia 

 area", and gives its northern distribution as "North Atlantic and adjacent seas, about 

 50-77 N and north of Alaska". 



Pseudorchomene coatsi, Chilton. This species only occurred at two stations off the 

 north-east coast of South Georgia : 



St. 129 1 at 0-501. St. 130 1 at 38 m. 



12 at 84-0 m. 



It was also recorded by Barnard (1932) from trawl hauls in the same region. Many 

 specimens were taken by the 'Scotia' (Chilton, 191 2) off Coats Land in lat. 71 1' S 

 and by the 'Gauss' (Spandl, 1927) at their winter stations, approx. 66° S. 



Primno macropa Guer. This cosmopolitan species was widely distributed in the area, 

 but was never taken in large numbers. A complete record of its occurrence is given in 

 Appendix II. Barnard (1932) writes that it "appears to be principally rather a deep- 

 water species (500-1000 m. or more) ". The following table gives its depth distribution 

 as shown bythe N 70 V nets, where it will be seen thatwhilst on occasions it maybe taken 

 in the cold polar surface layer it is truly an inhabitant of the warmer water below, and 

 appears to be evenly distributed from 100 to 1000 m. This table should be compared 

 with the temperature and salinity curves in Figs. 7 and 8. 



Reference to the N 100 H tables in Appendix II will also show that it is more usually 

 taken in the lowest of the series of three nets. The numbers in these nets are small, and 

 we were not able to detect an indication of vertical migration : out of fifty-eight stations 



1 Consecutive net series. 



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