324 BOTANICAL GAZETTE [NOVEMBER 
PLATE XI, E bh trtdzs De Bary. 
J 
Fic. 11. Surface view and section of wartlike formations in wall. X 250. 
Fig. 12. Section showing successive formation of walls. X 250. 
Fic. 13. Abnormal condition resembling zoosporangium. X 250. 
Fic. 14. Foreign organisms found within cell similar to fig. 73. X 830. 
Fic. 15. Ultimate development of ciliated organisms. X 830. 
Fig. 16, Normal appearance of chromatophores, with pyrenoids. 830. ’ 
Fic. 17. Chromatophores after being crushed out in water. X 830. 
Fic. 18. Pyrénoids after treating with chloral hydrate. X 830. 
F1G. 1g. Resting spores formed immediately after division. x 250. 
Fic. 20. Resting spore formed from mature plant. X 250. 
PLATE XII. Excentrosphaera viridis Moore. 
Fic, 21. General appearance with successive stages in development from 
spore. X 250. 
FiG. 22. Escape of spores. X 250. 
FIGs. 23, 24. Cellulose projections of wall. x 250. 
Fig. 25. Section through cell, stained to show pyrenoids. X 250. 
Fig. 26, Section showing first divisions of nucleus previous to spore for- 
mation. X 250. 
Fic. 27. Homogeneous appearance of cell previous to spore formation. 
X 250. 
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