148 



51 



v. 



FEBRUARY 1927 



«*?□ 



DECEMBER - JANUARY 1926-7 39° 



SCALE 



•0 



□ 1-25 



150-100 

 " 100-500 



500-1000 



>IOO0 



39 



_1_ 



MARCH 1926 



J, 



^iM^^ 



C^M 



r::::.: 



DISCOVERY REPORTS 



45° 



40" 



X 



38° 



35 



30" 25 



FEBRUARY 1926 



38- 



37 • 



36° 



NOVEMBER 1926 



□ 



r. 



53 



54 



55 



Fig. 70. Charts showing the distribution of Ctenocalanus vanus in the upper layers of water at stations in the 

 1926-7 surveys. The squares represent the average numbers per 50 m. vertical haul with N 70 V nets from 

 250 m. (or less at shallow-water stations) to the surface. For hydrological and phytoplankton conditions 

 see Figs. 2, 6, 7, 8, 38, 39 and 41. 



