. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SI8 DISCOVERY REPORTS Chaetognatha, Ostracoda, Amphipoda, the pteropods Limacina and Clio, and young fish occurred in small numbers along the roll. Records 4 and 5 Date: 25-26. i. 26. Time: 1117-1830 and 1845-1730. Position: 310 07' S, 30 29' W to 310 32' S, 6° 40' W (approx.). Distances by ship's log: 43-3 and 120 (approx.) miles. RECORD 4 l°] DIPHYIDAE oJ RECORD 10] EUPHAUSIACEA JUV. 01----- --â ⢠'â 5-1 EUPHAU5IACEA AD Q±. I I . I . 1. ..... . 1 1 1 1 1 5 1
. Discovery reports. Discovery (Ship); Scientific expeditions; Ocean; Antarctica; Falkland Islands. SI8 DISCOVERY REPORTS Chaetognatha, Ostracoda, Amphipoda, the pteropods Limacina and Clio, and young fish occurred in small numbers along the roll. Records 4 and 5 Date: 25-26. i. 26. Time: 1117-1830 and 1845-1730. Position: 310 07' S, 30 29' W to 310 32' S, 6° 40' W (approx.). Distances by ship's log: 43-3 and 120 (approx.) miles. RECORD 4 l°] DIPHYIDAE oJ RECORD 10] EUPHAUSIACEA JUV. 01----- --â ⢠'â 5-1 EUPHAU5IACEA AD Q±. I I . I . 1. ..... . 1 1 1 1 1 5 1 1 1 1 1 10 15 â1â1 â1â1â1â1â1â1ârâ 5 1 1 1 1 10 15 20 -1â1âr 1 i 25 1 1 1 1 1 30 1 1 1 1 35 RECORDER SECTIONS A â² â² â² â² â² â² â² â² â² â² O O 0 0 O O 0 O O O 0 0 O m 0 0 10 a O m O O PJ a 0 in 0 n i\ rvi to. OJ 0 0 0 0 Fig. 5. Variations in the numbers of the predominant plankton organisms on Records 4 and 5 taken over distances of 43-3 and 120 (approx.) miles respectively. A time scale (blacked in triangles) is provided below the graphs. Record 6 Date: 26-27. i. 26. Time: 1855-1800. Position: 310 32' S, 6° 40' W to 320 56' S, 8° 37' W. Distance by ship's log: 121-1 miles. These three records, 4, 5 and 6, form a continuous series in the South Atlantic to the north-east of Tristan da Cunha. Record 6, which was badly preserved, will be dealt with separately. Fig. 5 shows the fluctuations in the more important forms on Records 4 and 5: Diphyidae, Chaetognatha, Copepoda, Euphausiacea and their larvae. We may note the small concentration of Diphyidae, the larger numbers of Copepoda taken between 1700 and 1800 and between 0700 and 0900, and the larger numbers of Euphausiacea taken at night, no doubt due to vertical migration. Record 6 was a trial made without using the covering roll soaked in formalin, and it was found that the majority of organisms were decomposed beyond recognition and a quantitative estimate was impossible. The
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