PLATE 9. 



Papulospora spinulosa. 



Figures 1-7. Stages in the development of the bulbil. 



Figure 8. Primordia produced from a superficial cell of an immature bulbil. 



Figure 9. Section of a mature bulbil showing the "Annulus." 



Figure 10. A surface view of the same looking down on the "Annulus." 



Papulospora irregularis. 



Figures 11-17. Stages in the development of the bulbil. 

 Figure 17. A mature bulbil. 



Papulospora pannosa. 



Figures 18-20. Stages in the development of the bulbil. 

 Figure 20. A mature bulbil. 



