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RESEARCHES ON FUNGI 



Fig. 188. — Nyctalis asterophora. A, a young and partially developed fruit-body 

 with a small rounded pileus and no hymenium (= Asterophora trichioides Ft.). 

 Natural size. B, longitudinal section through the upper part of a fruit-body 

 somewhat further developed, showing numerous chlamydospores in the outer 

 stratum of the pileus-flesh ; hymenium and gills wanting. Magnification, 90. 

 C, longitudinal section through a larger fruit- body, seen by reflected light. 

 Natural size. D, the same section as C, magnified about 4 times, seen by 

 transmitted light : a, chlamydospore-layer ; b, sterile layer (hymenophorum) ; 

 h, hymenium ; gills absent. E, a longitudinal section through a fully developed 

 fruit-body with definite gills, seen by reflected light ; the white outer stratum 

 of the pileus-flesh is the chlamydospore-layer. Natural size. F, a ripe 

 chlamydospore from the chlamydospore-layer of a pileus. G : a, a hypha 

 about to form a chlamydospore ; b, a ripe chlamydospore. F and G, magni- 

 fication, 390. H, transverse section through one of the gills of E ; h, the 

 hymenium with a few of the basidia bearing basidiospores. Magnification, 

 120. I, hyphae removed from the hymenium : a, basidia with some of the 

 subhymenial cells ; b, a basidium bearing spores. Magnification, 390. The 

 drawings copied by Dr. Nellie Carter from de Bary's paper in the Botanische 

 Zeitung (Bd. XVII, 1859) and arranged by the author. 



