13 000 

 10 000 

 7 300 

 5 100 

 3400 

 2 100 

 a 1200 

 650 



AUG 3-20,1929. 



DIATOMS 



GREEN ALGAE 



BLUE GREEN ALGAE 



I 345679 11 53 24 

 STATONS EAST » 



80 \ 



\ / 

 10 \ / 

 V / 



I 34 5 7 S II 53 ^4 i3 22 k) 21 \t 13 17 52 19 & i6 t^ 50 ^i ^ iO i6 46 4i ti ii Al ^ ^9 



"•BATONS EAST 1^ WEST 



Figure 52. - -Distribution of ±e major groups of phytoplankton August and September, 1929, 



139 



