456 



RESEARCHES ON FUNGI 



carried out, not only shows that the life-history of this fungus can 

 be followed step by step in pure cultures, but proves conclusively : 



YiG. 189. — Nos. 1-5, Nyctalis astcrophora (= N. lycoperdoidcs Bull.)- 

 No. 1, a small mycelium, grown from a basidiospore a/j, with clamp- 

 comiections at the cross-walls, bearing chains of oidia oi, and 

 chlamydospores clsp. No. 2, a small mycelium, grown from a 

 basidiospore sp, the hyphae of which have become completely broken 

 up into oidia. No. 3, a piece of mycelium breaking up into oidia oi. 

 No. 4, a piece of mycelium with two chlamydospores clsp, and clamp- 

 connections at the cross-walls. No. 5, a chlamydospore producing a 

 germ-tube. Nos. 6-9, Nyctalis parasitica. No. 6, a transverse 

 section through the hymenium, showing basidia bearing basidiospores 

 and chlamydospores lying between them. No. 7, mycelium, grown 

 from a basidiospore, and bearing chlamydospores. No. 8, a hypha 

 bearing a ripe chlamydospore, more highly magnified. No. 9, a 

 chlamydospore germinating. After Brefeld, from von Tavel's 

 Vergleichende Morphologie der Pilze. Magnification : Nos. 1-6 and 9, 

 350 ; No. 7, 180 ; No. 8, 450. 



(1) that the chlamydospores taken from a pileus germinate readily 

 on living Russulae, (2) that the basidiospores, when produced, 

 germinate readily in a Russula decoction, and (3) that the my- 

 celium produced from a basidiospore breaks up into oidia which in 

 their turn readily germinate, eventually producing typical stellate 

 chlamydospores. 



