DISTRIBUTION OF ANTARCTIC MACROPLANKTON 



125 



plankton in which Sibogita, Dimophyes, Diphyes and Aiiricalaria were all present, while 

 the warm-water species were much reduced. The state of affairs is illustrated in Fig. 40. 



Table V. Warm- and cold-water species in the South Sandwich 

 and Weddell regions 



In the 1929-30 season the ' Discovery II ' visited the South Sandwich Islands during 

 the end of February and the beginning of March, just after the South Georgia survey. We 

 have seen that this survey revealed a warm-water plankton, and at the first three stations 

 on the way to the South Sandwich Islands (Sts. 360-2, Fig. 12) the warm- water species 

 were still predominant (see Fig. 41 and column 2 in Table V). At St. 365, however, 

 Pyrostephos, Dimophyes and Eusirus make their appearance, and at St. 369 Pyrostephos 

 and Diphyes antarctica were taken. At St. 368, the only other N 100 B station taken at 

 this time, the sample could not be properly analysed owing to a large catch of Euphausia 



