MATERIAL 



199 



the Antarctic and sub-Antarctic and the coldest parts of the subtropical Zones, 

 encircling the Antarctic continent east-about from South Africa to South America, was 

 made in the winter months (April-October) of 1932. A line of stations from South 

 Georgia to the ice-edge off the Antarctic continent near the meridian of Greenwich and 

 from there to the Cape was made in March 1933 (Fig. 3). 



10 



20 



30 



46 



50 



60 



Antarctic Zone 



Souivt 



- 40 



6d 



80° 



70 



60° 



50° 



40° 



30° 



20° 



10 



10° 



20 



30" 



Fig. 4. Chart showing the probable average positions of the Antarctic, subtropical and tropical convergences 

 in the South Atlantic (from Hart, 1934, Discovery Reports, viii, p. 5). 



The southern limit of the two sets of stations in the Falkland sector was the edge of 

 the pack-ice — which had different positions in the two seasons — with the exception that 

 the stations in the Weddell Sea during the first season were made in loose pack-ice 

 itself. Each of the southern turning points of the circumpolar cruises was at the edge 

 of the ice fringing the continent except that to the south-west of South America, where 

 the amount of fuel remaining on the cruise from New Zealand was not enough for the 

 ship to go on to the ice-edge. 



Among the eleven hauls of plankton nets made at most of these stations were two 

 oblique hauls, one from approximately 250 to 100 m., the other from approximately 

 100 m. to the surface, taken with a conical net with a mouth i m. in diameter and the 

 greater portion of its fishing part of stramin. This is the N 100 fully described by 

 Kemp and Hardy (1929, p. 184). The specimens of Euphausia in almost all those net 



