. 40 Fig. 42. Distribution of warm- and cold-water plankton between South Georgia and Bouvet Island. The edge of the pack-ice is indicated. a warmer type. There was a single specimen of Eusirus at St. 466 and of Auricularia at St. 469, but at all of these stations there were large numbers of Limacina balea, reaching a maximum at St. 466, and comparatively abundant Euphausia frigida (both warm-water species). At St. 470 there were three specimens of Eusirus and at Sts. 471 and 472 Diphyes antarctica reappeared and the numbers of L. balea and E. frigida became suddenly reduced. When the ship rea
. 40 Fig. 42. Distribution of warm- and cold-water plankton between South Georgia and Bouvet Island. The edge of the pack-ice is indicated. a warmer type. There was a single specimen of Eusirus at St. 466 and of Auricularia at St. 469, but at all of these stations there were large numbers of Limacina balea, reaching a maximum at St. 466, and comparatively abundant Euphausia frigida (both warm-water species). At St. 470 there were three specimens of Eusirus and at Sts. 471 and 472 Diphyes antarctica reappeared and the numbers of L. balea and E. frigida became suddenly reduced. When the ship reached South Georgia the November survey was begun, and as already noted revealed here a very cold-water plankton. It seems there- fore that in the early summer of 1930-1 there was a cold-water plankton in the neigh- bourhood of Bouvet Island and South Georgia, but between the two a rather " warmer " plankton. When the ship reached South Georgia the pack-ice was lying close up to the island, but at the end of November, when the survey was finished, the ice-edge had receded some way to the south-east. In December the 'Discovery II' sailed in this direction, and, on meeting the ice, followed its edge in a south-westerly direction, taking Sts. 528- 33 in the positions shown in Fig. 43. Here the constitution of the plankton was still very " cold " (see column 5 in Table V, p. 125), even more so than around South Georgia
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