EXPLANATION OF PLATE XI 



Comatricha nigra Pers., p. 128. 



Fig. i. A group of sporangia, x 10. 



Fig. 2. A single sporangium as in section, x 60. 



Fig. 3. A single spore, x 1600. 



Stemonitis conflucns Ell. and Cke., p. 114. 

 Fig. 4. A group of sporangia, x 10. 

 Fig. 4 a. A thread of capillitium with adhering disk, x 30. 

 Fig. 5. A spore of the same, x 2000. 



Stcuionitis webber i Rex, p. 120. 



Fig. 6. A group of sporangia, x 4. 



Fig. 7. A single sporangium as in section, x 40. 



Fig. 8. A single spore, same species, >: 1250. 



Comatricha sitksdorfii Ell. and Ev., p. 133. 



Fig. 9. A group of sporangia, x 4. 

 Fig. 10. A bit of the capillitium, x 60. 

 Fig. u. A single spore, x 1600. 



Comatricha cccspitosa Sturg., p. 124. 

 Fig. 12. A cluster of sporangia, x 4. 

 Fig. 13. The capillitium highly magnified. 

 Fig. 14. A single spore, x 1600. 



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