196 WISCONSIN PHYTOPLANKTON 



PLATE 11. 



Page 



Fig. 1. Anabaena Lemmcrmanni (x 400) 61 



Figs. 2-4. Aphanizomenon flos-aquae (Fig. 2, x 400; figs. 3-4, x 1000) . . 61 

 Figs. 5-6. Gloeotrichia ec.Mnulata (x 400) 63 



