1916] FoMES OFFICINALIS (Vill.) 209 
Fig. 16. Chlamydospores from the same culture as in Fig. 15. Various 
sizes and shapes are shown in the series a, b, c, d, e. 
Fig. 17. A portion of the fruiting mycelium of Fomes officinalis taken 
from a culture. 
Fig. 18. Chlamydospores from the crust of a fruiting body of F. offici- 
nalts. 
Figs. 19 & 20. Abnormal hyphae from the context of a fruiting body of 
F. officinalis. 
Fig. 21. A fragment from the fruiting body of Fig. 5. This piece con- 
sists of a solid matrix of translucent yellow resin in which 
are embedded thin-walled hyphae, like those of Figs. 22 
and 23, and a smaller number of thick-walled threads. 
Figs. 22-25. Types of hyphae from the fruiting body of F. officinalis. 
Fig. 22 shows a type common near the surface, the branches 
passing out parallel. Fig. 24 shows a small amount of 
resinous secretion in the form of granules. 
Figs. 26-29. Hyphae from the fruiting body of F. officinalis showing 
secretions of resin in varying amounts. 
Fig. 30. Hyphae from mycelial sheets of F. officinalis taken from white 
pine, with and without resin granules, and in a showing 
the character of the branching. 
