SPORKS AND THALLIDIA. 



21 



as the case may be. Aspergillus niger (see fig. 193^ and 193*), a Mould living 

 chiefly on the juices of fresh or preserved fruits, develops slender upright hyphse 

 with swollen ends, which bear numbers of short peg-like processes — the sterig- 

 mata — from which moniliform series of from five to eight spores are abjointed in 



Fig. 196. — Basifliomycetes. 



i Clavaria aurea. ^ Dcedalea quercina. * Marasmius tenerrimus. * Marasmius perforans. ^ Craterellus clavatus, ^Amanita 

 phalloides, ^ Clavate basidia with filamentous sterigroata, from tlie ends of wliich splierical spores are abjointed (from the 

 hymenium of Amanita phalloides). 8 Hydnum imhricatum. 9 Polyporus perennis. i, 2^ 8^ 4^ 6^ e^ 8^ 9 natural size; 

 7x260. 



rapid succession. These spores at first hang loosely together, and are arranged 

 like strings of pearls, but collectively these rows of spores form a spherical head. 

 A shock of any kind, especially the disturbance occasioned by currents of air, will 

 cause a severance of the spores, and the entire sphere consequently falls to pieces. 



