PLATE 4. 



Tig. 1. Section Sogne Fjord (61« 9.' 5" N. Lat., 3" 50' 5" E. Long.) — Iceland (66° 32' N. Lat., 7° 15' W. Long.), May 1896. 

 The Salinity of the various layers is given in the same colours as on Pis. 1 — 2. 



The Isotherms and Temperature are printed in red lines and figures. The coloured double columns under individual Stations 

 represent the occurence of Plankton Organisms. The individual Species are printed to tlie left of the liorizontal lines; the 

 Oceanic Species being denoted by Blue colouring, the Neritic by Eed (Southern or Summer Forms); Brown representing the 

 Northern or Winter Forms, and Green the Arctic Forms. 



The comparative frequency is given in various tones af colouring, the light tints indicating that the species occurs in few 

 numbers, the darker denoting a plentiful appearance. 

 See Hydrographical Table A, III, and Plankton Table 2. 

 Ik). 2. This repi'csents the same Section in May 1897. Hydrographical Table A. V., Plankton Table 4. 



