PLATE 62 



OlPIDIOPSIS SAPROLEGNIAE \ar. LEVIS 



Fig. I. Sporangia causing gall in tip of hypha. 



Fig. 2. Sporangia sending tubes through wall of host. 



Fig. 3. Two empty sporangia and one oogonium with an empty antheridium. 



Fig. 4. Several small sporangia in a gall. 



Fig. 5. Oogonia with antheridia. 



Fig. 6. Sporangia in hypha of a species of Aplianoynyces. 



All figures X 447, and all from Saprolegnia Jerax. 



OLPIDIOPSIS SAPROLEGNIAE 



Fig. 7. Oogonia with spines. 

 Fig. 8. Oogonia merely rough or warted. 

 Fig. 9. Spores with cilia. 



Fig. 10. Oogonium with antheridium, and sporangia discharging spores, all inside a hypha 

 of Achlya flagellata. 



Figure 9 X 613; others X 447. 



Rhizophidium carpophilum 



Fig. II. Sporangia on oogonia of Achlya apicidata, the lower one with a short protrusion 



which is about to break. 

 Fig. 12. Smaller sporangia on oogonia of Achlya apicidata, some already discharged, others 



forming resting bodies. 

 Fig. 13. Sporangia on oogonia of Achlya apicidata, one of the sporangia in act of giving off 



spores. 



All figures X 670. 



