190 WISCONSIN PH7TOPLANKTON 



PLATE 5. 



Page 



Figs. 1-2. Microcystis aeruginosa (Fig. 1, x 825; fig. 2, x ISO 39 



Fig. 3. Nicrocystis flos-aquae (x 825) 39 



Fig. 4. Microcystis incerta (x 825) 40 



Fig. 5. ApJianothece prasina (x 825) 45 



Fig. 6. Aphanothece nidulans var. endophytica (x 1000) 44 



