PLATE 27. 



Sphaerelloideae. 



Fig. 1. Physalospora aurantia, E. <fe E. on dead leaves of Atraya- 



. natural size. 



2. Part of a leaf somewhat enlarged. 



3. Enlarged section of a perithecium. 



4. An ascus with uniseriate sporidia. 



5. An ascus with partly biseriate sporidia. 



6. A sporidium. 



7. Sphaerella Oenotherae, E. & E. natural size, on old capsule 



of Oenothera biennis, 



8. A small piece enlarged. 



9. Enlarged section of a perithecium. 

 " 10. An ascus. 



11. A sporidium. 



12. Stigsnatea Robertiana, Fr. natural size, on leaf of Geran- 



ium Robertianutn. 



13. Piece of same enlarged. 



14. Sectional view of perithecium. 

 15. An ascus. 



16. A sporidium. 



17. Sphaerulina myriadea, (Pers.) natural size on dead oak 



leaf. 



18. Portion of same enlarged. 



19. Sectional view of a perithecium more highly magnified. 

 >l 20. An ascus. 



21. A sporidium. 



