350 



RESEARCHES ON FUNGI 



in a cystidium either continuously or at irregular intervals ; for, 

 otherwise, the walls of the vacuoles could not change their dimen- 

 sions. The cystidia grow apically, and, as they elongate, their 



Fig. 157. — Coprinus micaceus. A--E, showing protoplasmic 

 contents. A and B, two young cystidia ; C, a full-grown 

 one ; all from the surface of the hymenium. D and E, 

 cystidia from a gill-edge. In B, the vacuolated protoplasm 

 lies just beneath the cell-wall. In A, C, D, and E, a central 

 clump of protoplasm, which constantly moves about the 

 middle of each cystidium, is supported by the protoplasmic 

 walls of large vacuoles. F, a cystidium projecting from 

 the hymenium ; the hymenium also contains several 

 paraphyses and two basidia, one of the shortest and one 

 of the longest types. G-J, dying cystidia : as the walls 

 contract, the protoplasm is first thrown into transverse 

 wrinkles (G aild H) and then the walls become more or less 

 transversely folded (I and J). Magnification, 293. 



protoplasmic contents diminish in quantity and the strands sepa- 

 rating the vacuoles become fewer. In some cystidia, no doubt, the 

 protoplasmic clump is brought to the periphery ot the cell, and then 

 one huge vacuole, like that represented in Fig. 157 at G, occupies 

 the whole of the cell-centre. 



