PLATE 33. 



Valseae. 



Fig. 1. Valsa floriformis, E. & E. somewhat enlarged, on hark. 



" 2. Horizontal section through a stroma. 



" 3. Vertical section, much enlarged, showing the perithecia 

 lying around the labyrinthiform, central spermogonial 

 cavities. 



4. An ascus. 



" 5. Two sporidia. 



" 6. Two spermogonial spores. 



" T. Calosphaeria microsperma, E. & E. somewhat enlarged, on 

 bark of Carpinus. 



8. A cluster of perithecia somewhat enlarged and exposed by 

 the removal of the bark. 



" 9. Three clusters of asci arising from interwoven, branching 

 filaments in the bottom of the perithecia and accom- 

 panied by very long stout paraphyses. 



" 10. Four sporidia. 



" 11. Eutypa echinata, E, & E. somewhat enlarged, on Fraxi- 

 nus. 



" 12. An ascus. 



" 13. Three sporidia.* 



" 14. Diaporthe tuberculosa, Ell., an ascus. 



" 15. A sporidium. 



" 16. Diaporthe densissima, Ell., two sporidia. 



