PLATE 10. 



Papulospora coprophila. 



Figures 1-8. Stages in the development of a bulbil from a spiral. 



Figure 6. An unusual condition, the production of conidia directly from the 



spiral. 

 Figure 8. A spiral primordium surrounded by an irregular layer of cells. 

 Figure 9. Immature bulbil that has developed like Figs. 14 and 15, and also 



a spiral primordium. 

 Figure 10. Median section of a mature bulbil with two large central cells. 

 Figure 11. A mature bulbil with the contents of the large cells crushed out 



(Fig. lib). 

 Figure 12. Germination of one of these cells. 

 Figures 13-15. Forms arrested in the process of development. 

 Figures 16. Surface view of the mature bulbil. 



Papulospora immersa. 



Figure 17. Irregular hypha densely filled with protoplasm. 



dium of the bulbil. 

 Figure 18. Primordium consisting of a single intercalary cell. 

 Figure 19-25. Stages in the development of the bulbil. 



The primor- 



