and some other Grasses. 473 



Fig. 6. Shows the membrane of one of the spofidia, laid open, increased in size, 

 and developing granules on various points of its surface. 

 7. Shows the manner in which the sporidia become divided by a septum 

 or septa, by the granules extending themselves transversely ; differ- 

 ent stages being observed in the first and succeeding ones. 

 8 & 9. More advanced states of growth. 



10. The fungus, assuming a radiating form, and developing sporidia upon 



its branches. 



11. Granules from the interior of the sporidia, arranged singly, or in twos 



or threes. All the preceding figures magnified seven hundred times. 



12. The Acarus, which lives on the interior of the eigot, magnified fifty 



times. 



3 Q 2 



