. Fig. 19. The distribution of Chaetoceros socialis, South Georgia survey, November 1930. estimation was, however, confined to the densely populated region to the south-west with the single exception of the anomalous St. 493 on the Larsen line. Chaetoceros negleclus (Fig. 21) was another widely distributed form, showing, how- ever, a strong maximum to the south-west and south, where at some of the inshore stations it occurred in such numbers as to render estimation impossible. This was due chiefly to the presence of Ch. socialis at the same stations, as when this species was absent it was foun
. Fig. 19. The distribution of Chaetoceros socialis, South Georgia survey, November 1930. estimation was, however, confined to the densely populated region to the south-west with the single exception of the anomalous St. 493 on the Larsen line. Chaetoceros negleclus (Fig. 21) was another widely distributed form, showing, how- ever, a strong maximum to the south-west and south, where at some of the inshore stations it occurred in such numbers as to render estimation impossible. This was due chiefly to the presence of Ch. socialis at the same stations, as when this species was absent it was found to be possible to count very large numbers of Ch. neglectiis. Here again this species reached its maximum in water of western Weddell Sea origin; to the east and north-east, where stations were worked in water originating in the eastern Weddell Sea, it was almost entirely absent.
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