PLATE 18 

 Saprolegnia parasitica 



Figs. I, 2, 3 and 4. Various forms of sporangia. X 447. 



Figs. 5. 6. 7, and 8. Gemmae. X 447. 



Fig. 9. Spores in first swimming stage. X 720. 



Figs. ID, II, and 12. Various forms of sporangia showing proliferation. X 447. 



