EXPLANATION OF PLATE I 



Ceratiomyxa fruticirtosa (Muell.) Macbr. 



Figs. 1, 2, 3, 4, 5. Habit, X 10; spores, X 1200; var. arbiiscula, habit, X 10; spores 

 of var. arbiiscula, X 1200; spores of var. porioides, X 1200. 



Fuligo septica (L.) Weber 



Figs. 6, 7, 8. Diagrammatic section of a small aethalium, X 5; spore, with outline of 

 two others to show variation in size, X 1200; var. violacea, spores, X 1200. 



Fidigo muscorum Alb. & Schw. 



Figs. 9, 10. Diagrammatic section of sethalium, X 5; spore, X 1200. 



Fidigo cinerca (Schw.) Morg. 

 Fig. 11. Spores, X 1200. 



Fidigo intermedia Macbr. 

 Fig. 12. Spore, X 1200. 



Fidigo megaspora Sturgis 



Fig. 13. Spore, X 1200. 



Badhamia versicolor List. 



Fig. 14. Two isolated spores, X 1200; spore cluster, X 550. 



Badhamia populina List. 



Fig. 15. Isolated spore, X 1200; spore cluster, X 550. 



