206 WISCONSIN PHTTOPLANKTON 



PLATE 21. 



Page 



Fig. 1. DictyospMerium pulchellum (x 1000) 105 



Figs. 2-3. Westella linearis (x 1000) 107 



Fig. 4. Westella botryoides (x 1000) 107 



Fig. 5. Dimorphococcus lunatus (x 1000) - 106 



