EXPLANATION OF PLATES. 



Plate III. 



PIG. 



1. Growing edge of fungus on glycerine-agar, x 200. 



2. Branch of growing edge, x 600. 



3. Clear and granular branches, x 600. 



4. Filament showing commencing segmentation and budding, x 600. 



5. Segmenting filament ; one branch throwing off conidia, x 600. 



6. Granular filament with branch forming conidia, x 600. 



7. Branch showing rapid budding, x 600. 



8. Branch showing rapid budding, x 600. 



9. Branch with single conidium, x 600. 



10. Rapid budding and separated conidia, x 600. 



11. Conjugation, x 600. 



12. Enlarging oospore and atrophy of one of the conjugating cells, x 600. 



13. Spore cysts and sporophores springing from filament, x 150. 



Plate IV. 



14. Sexual and vegetative forms of reproduction on a filament, x 150. 



15. Rupture of spore cyst and shedding of spores, x 200. 



16. Spore cyst before rupture containing numerous oval spores, x 600. 



17. Ruptured spore cyst, showing capitellum, the two layers of the cyst wall 



and the spores, x 600. 



18. Spores, x 600. 



19. Ruptured and atrophied spore cyst, x 600. 



20. Shed spores clinging to filament, x 150. 



21. Five spores sown in gelatine, the shaded area is an opacity in the film of 



gelatine, x 150 



22. The same spores 24 hours afterwards, enlarging, x 150. 



23. ,, 48 „ sprouting, x 150 



24. „ 72 „ sprouts branching, x 150 



25. Spores beginning to sprout, x 600. 



26. Sprouts elongating, branching and segmenting, x 600 



Plate V. 



27. Polymorphic form of vegetative growth in bouillon, x 400. 



28. The growth of the fungus in tubes of glycerine-agar. 



(a) 24 hoars of inoculation. 



(b) 36 „ 

 (o) 48 



29. Growth of fungus in tubes (a) Beef bouillon. j 



(b) Sugar-starch solution. I ^ 



30. Fatty degeneration of mycelium and cells in sugar-starch solution culture, 



10 days old, x 600. 



31. Mycelium and conidia in teased connective tissues of dead locusts, x 600. 



