144 DISCOVERY REPORTS 



Falkland Islands to South Georgia, August 1928 (Sts. WS 251-256). Fig. 62. 



The Antarctic convergence was crossed between Sts. WS 253 and WS 254, and at the latter the 

 first station to the southward of it a small quantity of young krill was taken. At the succeeding 

 stations towards South Georgia krill was also present in small quantities. The stations which were 

 made in late winter were nevertheless in ice-free water, no pack was encountered. 



South Georgia survey, August-November 1928 (Sts. WS 257-285, WS 289-296, 

 WS311-313). Fig. 63. 



The observations off South Georgia in the early part of the 1928-9 season were divided into three 

 by two visits to the pack-ice to the east of South Georgia. 



In the first set of observations, Sts. WS 257-285, four lines from Bird Island, Prince Olaf Harbour, 

 Cape Larsen and Cape Vakop were made, between August 28 and September 18. 



At every station, with the exception of two on the Bird Island line, young krill was taken in com- 

 paratively small numbers for the most part, but with indication of a rather greater concentration 

 eastward of South Georgia at the outer stations of the Larsen and Vakop lines. On the last station on 

 the Vakop line (St. WS 285), the largest catch of 1600 individuals was made. 



From St. WS 285 the 'William Scoresby' steamed south to the edge of the not far distant pack-ice 

 where, as will be seen in the next section, abundant krill was found. 



The line from Cooper Island was completed at the beginning of October, and at each of the 

 stations from WS 291 to 296 krill was taken. At the inner stations the quantity was small, whilst the 

 two outer stations yielded moderately abundant amounts. 



The three stations WS 31 1-3 13 to the eastward of South Georgia were made between October 10 

 and November 5, only one young euphausian being taken. 



The pack-ice stations, September-October 1928 (Sts. WS 286-288, WS 297-310). 

 Fig. 64. 



On September 18, on the way from the outermost station on the Vakop line to the edge of the pack, 

 St. WS 286 was worked, 900 young E. superba being taken. St. WS 287 was made inside light pack- 

 ice a few miles from the edge; only a moderate number of krill was taken. St. WS 288, worked just 

 outside the edge of the pack-ice, yielded over 20,000 young E. superba from one net haul. It is inter- 

 esting to note that this last station was made during the day at 1410 hours and that the net was fished 

 from 102 to o m., showing that in certain circumstances, if not invariably, the young E. superba do 

 not obey the same rhythmic diurnal migration noted in earlier larval forms, but may remain at the 

 surface during the hours of daylight. 



On the second visit to the ice east of South Georgia, nearly all the stations (WS 297-310) were 

 worked in the neighbourhood of the ice, and at every station, whether actually in close proximity to 

 the pack or so far from it that no note of its presence has been recorded in the station list, krill was 

 found. It should be noted that at such stations as WS 304 and WS 305, where the pack-ice was at some 

 distance, there were as many young euphausians taken as at stations worked at the edge of or actually 

 in pack-ice. When it is realized that the pack-ice is capable of considerable and rapid local movement, 

 due to wind, one would not anticipate that the greatest concentration of the animals would necessarily 

 be in the immediate proximity of the pack-ice, but rather that they should be distributed within the 

 area of the ice-edge movement. 



Falkland Islands to South Shetland, November 1929 (Sts. WS 468-474). Fig. 65. 



The next line of stations is that made in November of the following year between Falkland Islands 

 and South Shetland. At St. WS 468 made close to the Antarctic convergence one Furcilia 6 was 

 taken, and at St. WS 474, west of Elephant Island, two Furcilia 6 and one adolescent. No krill was 

 taken at the intervening stations. 



