306 



RESEARCHES ON FUNGI 



and consequently the area of the hymenial layer of the whole 

 fruit-body was approximately about 88 square cm. 



0-0771. TO. 



0~1 rum. 



0-2.771.772. 



03 



FIG. 103. Panaeolus campanulatus. An area of the hymenium equal to one- 

 seventh of 1 sq. mm., drawn after spore-discharge had ceased, showing the 

 exhausted basidia and the wasted spores. The paraphyses are omitted. 

 Most of the spores left lying on the hymenium were black. Four sets of spores, 

 a, b, c, and d each set of four the product of a single basidium were brown, 

 and one set, e, colourless. The four black spores at / are abnormally small, 

 and the single spores at g and h abnormally large. The number of sterig- 

 matic stumps on the exhausted basidia indicate that the area produced 1,832 

 spores. The wasted spores number 70, i.e. 3-8 per cent, of those produced. 

 Magnification, 293. 



On 0-01 square mm. of an exhausted hymenial area the number 

 of basidia was found to be 61. It was therefore calculated that 



