INTRODUCTION 



DLH Large dredge. Heavy pattern, 4 ft. in length (i -2 m.). 



CWS Centrifuged water sample. 



H Horizontal. 



KT Kelvin tube. 



LH Hand lines. 



NH Hand net. 



NHP A modification of Harvey's phytoplankton net. 1 A metal funnel (aperture 30-5 cm.) leads 



to a recording mechanism and thence to a sleeve-shaped silk net of 200 meshes to the 



linear inch, terminating in a conical bucket. The apparatus is hauled vertically, and the 



mechanism records the approximate volume of water filtered. 

 N 50 50 cm. tow-net. Mouth circular, 50 cm. in diameter (19-5 in.): 200 meshes to the linear 



inch. 

 N 70 70 cm. tow-net. Mouth circular, 70 cm. in diameter (27-5 in.): mesh graded, at cod-end 



74 to the linear inch. 

 N 100 1 m. tow-net. Mouth circular, 1 m. in diameter (3-3 ft.): mesh graded, at cod-end of 



stramin with 10-12 meshes to the linear inch. 

 N 450 4! m. tow-net. Mouth circular, \\ m. in diameter (14-8 ft.): mesh graded, cod-end of 



7 mm. (0-28 in.) netting, lined for part of its length with 4 mm. (0-16 in.) netting. 

 NRL Large rectangular net. Frame 8 ft. long and z\ ft. wide (2-45 m. x 0-7 m.) with bag of 



\ in. mesh (12-5 mm.). 

 Sh. Coll. Shore collecting. 

 TYF Young-fish trawl. A bag of stramin, with 10-12 meshes to the linear inch, attached to a 



circular frame 2 m. in diameter (6-6 ft.). 

 V Vertical. 



To the symbols for tow-nets (N 450, N 100, N 70, N 50 and TYF) B, H or V is 

 always added to indicate the direction in which the haul was taken. For determining 

 the depths of horizontal and oblique nets, Kelvin tubes or depth gauges were con- 

 stantly employed. Their use is indicated by symbols in the "Remarks" column, and 

 where no such symbol appears it is to be understood that the depth was estimated. 



For symbols used to denote meteorological observations, see Station List, 1931-33 

 (Discovery Reports, vol. xxi, p. 3). 



Soundings taken by the echo-sounding apparatus are marked with an asterisk. 



At the end of the lists (p. 196) will be found a summary of the stations made by the 

 R.R.S. 'Discovery II' from November 1933 to May 1935, with reference to the charts 

 on which the station positions are marked. 



1 See Harvey, H. W., 1934. Measurement of Phytoplankton Population. Journ. Mar. Biol. Assoc, 

 N.S. xix, pp. 761-73. 



