. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 2o6 DISCOVERY REPORTS these same meridians but from different years are plotted in Fig. 4. There are results for September 1936 in o°, June 1936 in 200 E and October 1932 in 8o° W. The results in September 1936 compared with those in September 1938 (Fig. 1) show the distribution of the plankton to be essentially the same. In 1936 the shallower hauls gave higher volumes than in 1938, especially at sub-Antarctic stations. Antarctic St. 1813 showed a particularly large volume at 50-0 m., but over 5
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. 2o6 DISCOVERY REPORTS these same meridians but from different years are plotted in Fig. 4. There are results for September 1936 in o°, June 1936 in 200 E and October 1932 in 8o° W. The results in September 1936 compared with those in September 1938 (Fig. 1) show the distribution of the plankton to be essentially the same. In 1936 the shallower hauls gave higher volumes than in 1938, especially at sub-Antarctic stations. Antarctic St. 1813 showed a particularly large volume at 50-0 m., but over 50 per cent of this was due to thirteen amphipods, and if they were omitted the volume would be similar to that at St. 1812, and both would be similar to the 1938 Sts. 2428 and 2430. In both years the deeper hauls at Antarctic stations gave large volumes, while those in sub-Antarctic waters were larger in 1938. 0° SEPTEMBER 1936 DEGREES SOUTH 36 38 40 42 44 46° 46° SO° 5 2° I I I I I I I I I 1 I I I I I I I CTN I8O6 1907 1BOS IB09 IBIO 1BI2 1813 J— 1 I 1 1 i »r 1 1 IOO - 250 - 500 . 7SO - OOO - f|| I500 - 1 20 E JUNE 1936 CTN IBOI 1799 1796 DEGREES SOUTH 56° 56° t I 1 1 I I imitT OMr IOO 250 SOO 7SO 80W OCTOBER 1932 0 oDEGREES SOUTH 56 58° 60° 6 2° 64 66* I I I I I CTN 9B4 986 987 989 991 993 J— I I I I AC | | I. Fig. 4. Vertical distribution of the standing crop of zooplankton during September 1936 in o°; June 1936 in 200 E; and October 1932 in 80° W. In 200 E there are no June observations in 1938, but the 1936 series shows the presence of deep concentrations of plankton at a level intermediate between that in April and July 1938 (Fig. 2); and similarly the surface volumes were on the whole not as large as those in April but greater than those in July. The results for 1936 thus appear to fit reasonably well into the general picture presented by the 1938-39 series. The October results for 1932 and 1934 (fig. 3) in 8o° W, compare very well and show the same e
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