PLATE 10. 



Perisporieae. 



Fig. 1. Scorias spongiosa, Schw. natural size on limb of Alnus 

 serrulata. 



" 2. Part of a fertile branch enlarged, showing spermogonial 

 and ascigerous perithecia. 



" 3. An ascus. 



" 4. Three sporidia. 



" 5. Oapnodiuin salicinnm, (Pers.). On bark of Negundo acer- 

 ozf^e*; a group of spei-niogonial and ascigei-ious peri- 

 thecia considerably magnified. 



" 6. An ascus. 



" 7. Three sporidia. 



" 8. Capnodinm axillatum. Cke. natural size on fragment of 

 leaf of Catalpa. 



9, A group of spermogonial perithecia, considerably magni- 

 fied. 



