Trans. Wis. Acad., Vol. XI 

 1,000. 



Plate XXXL 



900. 



800. 



700. 



603... 



500... 



400. 



300. 



200. 



100... 



...1,200 



..1,100 



Jan. Feb. Mch. Ape. May. June. July. Aug. Sept. Oct. Nov. Dec. 



Fig. 21. — Cyclops. Number of each catch, 1895- The curve indicates the aver- 

 age. Scale, 1 vertical space = 100,003 Crustacea per sq. m. See p. 370. 



