Plate 45 



Fig. 1. Chlorococcum humicola (Naeg. ) Rabenhorst, x 500 



Fig. 2. Golenkinia poticispina West & West, x 750 (redrawn 



from Smith ) 



Fig. 3. Golenkinia radiata (Chod.) Wille, x 750 (redrawn 



from Smith ) 



Figs. 4, 5. Acanthosphaera Zachariasi Lemmermann: 4, x 1000; 

 5, X 750 ( redrawn from Smith ) 



Figs. 6, 7. Chlorochijtrium Lemnae Cohn: 6, x about 250 (re- 

 drawn from Bristol- Roach ) ; 7, x 250 



Figs. 8-10. Kentrosphaera gloeophilu (BohHn) Brunnthaler, x 625 



Fig. 11. Characium ambiguiim Hermann, x 500 



Figs. 12, 13. Characium curvatum G. M. Smith, x 2000 (redrawn 

 from Smith ) 



Fig. 14. Characium falcatum Schroeder, x 700 



Fig. 15. Characium stipitatum (Bachm.) Wille, x 2000 (after 



Smith) 



Fig. 16. Characium gracilipes Lambert, x 1000 (redrawn from 



Smith) 



Fig. 17. Characium Hookeri (Reinsch) Hansgirg, on Cyclops, 



x500 



Fig. 18. Characium limneticum LemmeiTnann, x 1000 (re- 



drawn from Smith ) 



Fig. 19. Cliaraciopsis cijlindrica (Lambert) Lemmermann, x 



500 ( redrawn from Smith ) 



Fig. 20. Characium ohtusum A. Braun, x 1650 



Fig. 21. Characium Pringsheimii A. Braun, x 800 



Figs. 22, 23. Characium rostratum Reinhard: 22, x 500; 23, x 750 



[750] 



