ITINERARY: THIRD COMMISSION 297 



Sea. From there we worked eastwards across the Pacific in a rather higher southern 

 latitude than before, most of the observations being made south of the Antarctic circle. 

 This cruise showed larger quantities of phytoplankton than had been encountered in 

 the Southern Region in January, until the end of the first week of March. In the second 

 week of March there was a distinct falling off, but by that time we were working into 

 the eastern South Pacific area, which subsequent work has shown to be consistently 



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Fig. 4. Positions of the observations obtained in the South Georgia area during the third commission of 



R.R.S. 'Discovery 11'. 



poorer in phytoplankton than others. Fig. 5 indicates the order of the quantitative 

 differences observed during this cruise. 



Two lines of stations worked in the Scotia Sea early in April showed scanty phyto- 

 plankton, though there was a hint of slight secondary autumnal increase at two of them. 

 The long cruise eastwards in the autumn was carried out mainly in the Intermediate 

 Region. At first the phytoplankton was very scanty, but during the first week of May 

 distinct indications of autumnal secondary increase were observed. Thereafter the ship 

 was working in more northerly waters until refitted at Simonstown (South Africa). 



