Fig- 3 (c)- 



Fig- 3id). 



Fig. 3^ Soundings during hydrographical surveys: continuous records, (a) Tristan da Cunha group: approaching Falmouth 

 Bay Tristan da Cunha, and from thence to Nightingale and Inaccessible Islands, (b) Balleny Islands: running surveys of 

 1936 and 1938, together with contours, (c) South Orkney Islands: completion, in 1937, of the earlier running survey of 1933 

 (rf) Marion and Prince Edward Islands: 10 hr. continuous recording during an examination of these islands in 1935 



