PLATE 10. 



Perisporieae. 



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

 serrulate*. 



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

 and ascigerous perithecia. 



" 3. An ascus. 



" 4. Three sporidia. 



" 5. Capnodium salicinum, (Pers.). On bark of Negundo acer- 

 oide} a group of spermogonial and aseigerious peri- 

 thecia considerably magnified. 



" 6. An ascus. 



" 7. Three sporidia. 



" 8. Capnodium axil.latum. Cke. natural size on fragment of 

 leaf of Catalpa. 



" 9, A group of spermogonial perithecia, considerably magni- 

 fied. 



