350 THAXTER. 



PLATE IV. 



Sphaerocreas pubescens Saccardo & Ellis. 



Figure 79. Spore mass seen in optical section seated on fragment of wood. 

 Zeiss obj. A. oc. 4. 

 Figure 80. Hyphal bundles which radiate from the spore-mass. 

 Figures 81-82. Six spores showing their attachment to slender hyphae. 



Sclerocystis Dussii (Patouillard) von Hohnel. 



Figure 8.3. Sorus showing stalk arising from a second sorus below, with 

 central columella and external hyphal layer, above which is a portion of the 

 upper surface of the "stroma" showing the "giant cells." Zeiss obj. C, oc. 2. 



Figure 84. Section including the surface of the stroma with its giant cells, 

 and showing several different sori in situ. Zeiss obj. A, oc. 2. 



Figure 85. Two spores isolated and showing basal septum. 



Sclerocystis coccogena (Patouillard) von Hohnel. 



Figure 86. Small portion of a sorus, showing a small part of the columella, 

 spore zone and outer layer, the filaments of the latter producing several small 

 spherical chlamydospores. Zeiss obj. A, oc. 2. 



Figure 87. Small chlamydospores separated from surface of sorus- 

 envelope. 



Glaziella vesiculosa Berkeley. 



Figure 88. Hollow sporocarp. A lobe cut away to show interior, the 

 smaller black area below being the normal inferior perforation. Partly ventral 

 view. Somewhat less than natural size as reduced. 



Figure 89. Section of the sporocarp wall from a nearly mature individual 

 in which the spores are becoming discrete. Zeiss obj. A, comp. oc. 3. 



Figure 90. A similar section from a young individual, showing the dense 

 superficial layers, the (black) hyphal wefts associated with the sporogenous 

 filaments, and the crowded arrangement of the spores. Zeiss obj. A, comp.. 

 oc. 3. 



Figure 91. Tangential section from same individual, showing sporogen- 

 ous weft cut transversely, with several sporogenous hyphae emerging from it. 

 bearing terminal spores in several stages of development. Zeiss obj. A, oc. 2. 



Figure 92. Portion of fuUj^ mature sporocarp, showing a spore suspended 

 by hyphae in a large chamber, a part of the lacunose middle layer shown at 

 left. Zeiss obj. A, oc. 2. 



Figure 93. Hyphae from the middle zone of a younger individual. Leitz 

 water im. oc. 2. 



Figure 94. Hyphae from the same region in an older individual. Same 

 magnification. 



