200 WISCONSIN PHYTOPLANKTON 



PLATE 15. 



Page 



Figs-. 1-3. Chlorochromonas minuta (x 1000) 80 



Fig. 4. Peroniella planctonica (x 1000) 81 



Fig. 5. Botryococcus Braunii (x 400) 84 



Figs. 6-7. Botryococcus protuoerans var. minor (Fig. 6 x 500, fig. 7 x 



1000) 85 



Fig. 8. Botryococcus sucleticus (x 400) 83 



Fig. 9. Cliloro'botrys limneticus (x 1000) 82 



Fig. 10. Chlorobotrys regularis (x 1000) 82 



Fig. 11. OpJi iocytium parvulum (x 1000) 86 



Figs. 12-13. Ophiocytium capitatum (x 1000) 86 



Figs. 14-16. Ophiocytium capitatum var. longispinum (x 1000) 



Figs. 17-18. Tribonema minus (x 1000) 87 



