Lyman. —'Studies of Hymenomycetes. 
PLATE 21. 
Corticium effuscatum . 
Fig. 74. Section of hymenium showing discharged basidiospores which are 
always imbedded in the growing hymenium. X 550. 
Fig. 75. Basidiospores. X 1300. 
Fig. 76-77. Germinating basidiospores. X 1300. 
Fig. 78. Young mycelium from germinating basidiospore (sp.) showing pro¬ 
duction of chlamydospores and conidia. X 390. 
Fig. 79. Chlamydospore formation on germ tube in dilute decoction of horse 
dung. X 390. 
Fig. 80. Row of chlamydospores. X 390. 
Fig. 81-82. Developing chlamydospores. X 1000. 
Fig. 83. Mature chlamydospore. X 1300. 
Fig. 84-85. Germinating chlamydospores. X 625. 
Fig. 86. Typical conidiophore arising from vegetative hypha. X 550. 
Fig. 87-91. Stages in the development of conidiophore and conidia. X 760. 
Fig. 92-94 Proliferation and branching of conidiophore. Fig. 92, X 390; 
fig. 93, X 315; fig. 94, X 550. 
Fig. 95. Optical section of proliferating and branching conidiophore show¬ 
ing the dense protoplasm in the growing portion. X 550 
