Trans. Wis. Acad., Vol. XI. 

 July. Aug. 



400... 



300. 



200. 



100.., 



Sept. 



Oct. 



Plate XXIII. 

 Nov. 



Fig. 7. — Leading Crustacea, 1894. Scale, 1 space = 100,000 Crustacea 

 per sq. meter. See p. 308. 



D. hyalina §m m .. 9 . . 



Cyclops 



Diaptomus . . 



July. 



400... 



200... 



100... 



Fig. 10. — Total Crustacea, July-Dec, after deducting Chydorus. Scale, 



1 vertical space = 100,000 Crustacea per sq. meter. See p. 312. 



1894.... a 9 



1895.... - 



1896.... » ^ 



