EXPLANATIONS AND REFERENCES, 

 PLATE XCI. 



PAGE. 

 Fig. 1-4. CYLINDROCAPSA GEMINELLA, cells of filaments developing 



oospores, . .105 



Figs. 5 6. Maturing oospores, ...... 105 



Fig. 7. Oospore escaping from tegument. . . . 105 



Figs. 8, 9. Supposed spermagonia, . . . . .105 



Fig. 10-12. Oospores dividing and developing young forms, . . 105 



Figs. 13, 14. Spore divided into two and four, the same enlarging previous to 



red! vision, .... 105 



Fig. 15-17. Redivided and growing, . . 105 



" 18-20. CYLJNDROCAPSA AMXENA, vegetative filaments and spore forma- 

 tion . . . .105 



" 21-23. Spore development, . . . 105 



" 24. PRASIOLA MEXTCANA, natural size, . .107 



" 25. PRASIOLA CRISPA, natural size, . 106 



Figs. 26, 27. " small sections magnified about 400 diameters, 100 



