COPRINUS ATRAMENTARIUS 



k s t 



287 



Fli: \2'2 —Coprinus atramenlarius.- Semi-diaKranimatic soction taken in a prrr'-ndictilar plane fhrouRh three pills iIurinK spore- 

 (liseliarge and autodigestion ((•/. Fig. 118, B and G, p. 278). Seven zones can be distinguished. (1) a, zone m which the cystidia are 

 fully turgid and, by functioning as stays or distance-pieces, are holding the gills apart. The biisidia bear spores which arc nearly ripe. 

 CJ) 6, zone in which the cystidia arc disappearing through autodigestion. 'ihe spores arc rci..dy for diM barge, i^i) f, zone 01 ripesi 

 spores from which the cystidia have already disappeared. (4) d, zone of spore-discharge where cystidia are absent, ^^fo^f.^^^j^^''''^, 

 shot out into the intcrlamellar spaces and their sporabolas are represented by arrows. (6) e, the spore-free zone, (b) /, tne zone 01 

 autofligestion where basidia and paraphyses are being destroyed. (7) q, the liquid film at the giU-edge contaming the product* ot 

 autodigestion and undischarged spores, h, the hymenial layer made up of basidia, paraphyses, and cystidia ; jr, the subhy menial ceus 

 L the trama. i i, cystidia which have been torn from the opposite gills by their rounded apical ends, j 7, cystidia which have Deen torn 

 from the opposite ^ills in which they originated so that they are now attached by their apical ends : their contracted mottle-neck- ke 

 basal ends are free, k k, cystidia which have become very slender owing to autodigestion, but which are still attached to botn gilis. 

 I I, cystidia which are being withdrawn to the gill-sides, m, a cystidium which has snapped into two parts, o o remains 01 cjstiQia. 

 Everywhere the basidia arc soon to bo dimorphic, long and short ones alternating with one another. Magnihcation, lib. 



