Plate 53 



Fig. 1. Sorastrum spinulosiim Naegeli, x 590 



Fig. 2. Coelastrum camhricum Archer, x 412 (redrawn from 



Smith) 



Fig. 3. Coelastrum microporum Naegeh, x 350 



Figs. 4, 5. Coelastrum proboscideum Bohhn: 4, x 825 (redrawn 

 from Smith ) ; 5, x 650 



Fig. 6. Coelastrum reticulatum (Dang.) Senn, x 500 



Fig. 7. Coelastrum sphaericum Naegeh, x 237 (adapted from 



West and Fritsch, courtesy Macmihan Pubhshing 

 Co.) 



Fig. 8. Coelastrum proboscideum Bohhn, x 825 (redrawn 



from Smith ) 



Fig. 9. Zoochlorella parasitica Brandt: cells in Ophrydium, x 



500; enlarged cells, x 1000 



Fig. 10. Zoochlorella condiictrix Brandt: cells within tentacles 



of Hydra, x 100; enlarged cells, x 590 



Figs. 11, 12. Chlorella ellipsoidea Gerneck: x 225; 12, x 650 



Fig. 13. Chlorella vulgaris Beyerinck, x 1000 (redrawn from 



Smith ) 



Fig. 14. Westelki botryoides ( W. West ) de Wildemann, x 650 



Figs. 15, 16. Westella linearis G. M. Smith, x 500 (after Smith) 



Fig. 17. Trochiscia aspera (Reinsch) Hansgirg, x 850 



Fig. 18. Trochiscia granulata (Reinsch) Hansgirg, x 590 



Figs. 19, 20. Trochiscia reticularis (Reinsch) Hansgirg: 19, x 800; 

 20, X 1000 (redrawn from Smith) 



Fig. 21. Trochiscia Zachariasii Lemmermann, x 1000 



Fig. 22. Eremospluiera viridis DeBary, x 50 



Fig. 23. Planktosphaeria gelatinosa G. M. Smith, x 250 



766 ] 



