PLATE 22 



ISOACHI.YA UNISPORA 



Fig. I. Oogonium in an old sporangium. X 278. 



Figs. 2-6. V'arious forms of sporangia and proliferation. 3, 5 and 6 X 278; 2 and 4 X 



188. 

 Fig. 7. Proliferation as in Saprolegnia. X 278. 

 F'ig. 8. Proliferation through old sporangial wall. X 278. 

 Fig. 9. a Two spores stained upon emerging to show cilia; b two double spores with 4 cilia 



and one double spore encysted; c three encysted spores and one emerging 



from cyst; d and e masses of protoplasm escaped from sporangium without 



forming into spores. All X 810. 

 Fig. 10. Gemmae in a chain with an oogonium at tip of chain. X 278. 

 Fig. II. Sporangia renewed as in Achlya. X 278. 

 Fig. 12. Sporangia renewed as in Pythium. X 278. 

 Fig. 13. Sporangia renewed as in Achlya and in Pythium. Culture on corn meal agar 



square in H2O. X 278. 

 Fig. 14. Showing hypha growing through wall and forming sporangium as in 8. On corn 



meal agar square in distilled H2O. X 278. 



