PLATE 9 



Figures 19 to 27, showing food inclusions, fig. 19 killed in hot Schaudinn's 

 fluid, fig. 26 killed in strong Flemming's and stained in iron haematoxylin, and 

 figs. 20-25 and 27 killed in strong Flemming's and stained in Bordeau E iron 

 haematoxylin. 



Fig. 19. Ulothrix. 



Fig. 20. Two dinoflagellates, presumably Peridinium. 



Fig. 21. Gelatinous capsule of Pandorina and Scenedesmus. 



Fig. 22. Scenedusmus. 



Fig. 23. Pediastrum. 



Fig. 24. A diatom, presumably Navicula. 



Fig. 25. A ciliate, presumably Colpidium. 



Fig. 26. A diatom, presumably Navicula. 



Fig. 27. Pandorina. 



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