6o 



DISCOVERY REPORTS 



51 57' S, 32° 31' W, and continued to record it in varying quantities for 78 miles, after 

 which there followed 1 1 miles free of it and again followed another patch of 1 1 miles 

 across and then another free region towards South Georgia. A graphic representation 

 of this record is shown in Fig. 144. It was also met with at St. 41 in April nearer the 

 island. In the December-January survey of 1926-7 it occurred in moderate abundance 

 round the south end of the island in a somewhat similar distribution to that of Fragil- 

 aria antarctica. See Appendix I and Fig. 32. 



38' 



. 



D < 10.000 

 □ 10,000-50,000 

 1 50,000-100,000 



□ EUCAMPIA ANTARCTICA _TYPE BALAUSTIUM 

 \EUCAMPIA ANTARCTICA -TYPE MOLLERIA ■■ 



H£2-£ 





JO" 3+' 



j 30' 



s4 



Fig. 30. Distribution of Eucampia antarctica round South Georgia in the December-January 1926-7 survey. 



For full explanation see legend of Fig. 16. 



Navicula, etc. 



Navicida oceanica, Karsten, was recorded at only two stations: WS 31, 3600 (2) and 

 WS 45, 16,800 (7). 



Gyrosigma (Pleurosigma) directum, Grun., has been found only on the south-western 

 and southern side of the island in the region where the Weddell Sea and Bellings- 

 hausen Sea waters mix, and at St. 161 far to the south-west of the island. Its numbers 

 and distribution are shown in Appendix I. 



Scoliopleura pelagica, Karsten, was only recorded at two stations and in small numbers : 

 WS 34 and WS 44. 



