Archive image from page 138 of Discovery reports (1934) Discovery reports discoveryreports09inst Year: 1934 DISTRIBUTION OF ANTARCTIC MACROPLANKTON 127 superba. Column 3 in Table V, however, shows how greatly the warm-water species were reduced at Sts. 365 and 369. On leaving the South Sandwich Islands the ship started a line of stations to the west (Sts. 372, 373, etc.) and here we see the plankton was again of the warm type. Column 4 in the table shows a very striking contrast between Sts. 365 and 369, and Sts. 372 and 373. Fig. 41 shows the relative positions of the 'warm' and 'cold' plan
Archive image from page 138 of Discovery reports (1934) Discovery reports discoveryreports09inst Year: 1934 DISTRIBUTION OF ANTARCTIC MACROPLANKTON 127 superba. Column 3 in Table V, however, shows how greatly the warm-water species were reduced at Sts. 365 and 369. On leaving the South Sandwich Islands the ship started a line of stations to the west (Sts. 372, 373, etc.) and here we see the plankton was again of the warm type. Column 4 in the table shows a very striking contrast between Sts. 365 and 369, and Sts. 372 and 373. Fig. 41 shows the relative positions of the 'warm' and 'cold' plankton. In the 1930-1 season a number of stations were taken to the east and south-east of South Georgia (see Fig. 14, p. 82). In October the ' Discovery II' sailed from Capetown to South Georgia via Bouvet Island and the journey from Bouvet Island to South Georgia was mainly along or through the outskirts of the pack-ice (see Fig. 42). As these stations are in the form of an extended line they are not separated into groups and shown in Table V. The stations at the east end of this line had not perhaps a very 'cold' plankton, but Diphyes antarctica was present at all of them, Dimophyes was taken at St. 453, and Haloptilus ocellatus appeared at St. 460. At Sts. 462-9 the plankton was of 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 pla
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