15 



Fig. 19. — Vertical section through a typical sporodochium. The 

 dense aggregate of fungous tissue has broken through the 

 periderm, and produced a superficial zone of branched coni- 

 diophores, in the terminal parts of which spores have been 

 formed. Semi-diagramatic from a camera drawing. X-75. 



PLATE XII. 



Fig. 20. — A single branched conidiophore showing characteristic 

 form and septation. The spores are loosely attached and 

 easily separate from the conidiophores. X-800. 



Fig. 21. — Terminal portion of a conidiophore showing the origin 

 of spores. X-800. 



Fig. 22. — Camera drawing of spores showing the variation in 

 form. X-800. 



