Trans. Wis. Acad., Vol. XI. 
Plate XXXIX. 
Pr. ct,.Q 10 20 30 40 50 60 70 80 90 100 
Fig. 29—Summer distribution, 1896. Diaptomus, Cyclops, D. hya- 
lina. See p. 394. 
D. hyalina. , ___ . . ____ 
Cyclops. ... 
Diaptomus.... 
