I M M J-L-U-l 1 II 11 1 II II 1 U-L 



I I 1 I I NL^ ^^I 



^ph 



nKDmrmJ 



TJ^IEpmmiir^^ 



nnr 



Mm 



TTTTTTTrrTTlTrTrrrrTTnTrrTTTT>- 



-rrrTTT I 1 1 1 1 1 1 1 U trJ 



Pig. 26. — Diagram showing the numerical results for the net plankton of Lake 

 Mendota in 1916 and 1917. The various planktonts are indicated in the 

 explanation on page 60. 



