STROPHARIA SEMIGLOBATA 



333 



is well exhibited for the spores of a basidium just to the left of the 

 middle of the Figure. 



By the same methods as those which were employed for Panaeolus 

 campanulatus, the hymenium of Stropharia semiglobata has been 

 analysed in detail. At A, B, and C in Fig. 118 are represented 

 pieces of the hymenium of a fruit-body which had been shedding 

 spores for one, two, 

 and about six days re- 

 spectively. We thus 

 have presented to us 

 a series of illustrations 

 of the hymenium 

 showing its gradual 

 exhaustion, which is 

 complete at C. A 

 day was reckoned as 

 24 hours, and only 

 such elements were 

 drawn as could be 

 clearly perceived with 

 the microscope. The 

 cells of the hymenium 

 can be divided into the 

 following six classes : 

 (1) past - generation 

 basidia, a a, every- 

 where distinguished 

 by their being collapsed, non-protuberant, and devoid of protoplasmic 

 contents, and by containing sterigmatic stumps within their concave 

 tops ; (2) present-generation basidia, b b, fully protuberant, with the 

 maximum diameter, and each bearing four spores into which the 

 protoplasm is passing or has passed ; (3) coming-generation basidia, 

 c c, fully protuberant, with the maximum diameter, densely filled 

 with protoplasm, lacking spores, but either with sterigmata, as in B, 

 or without them, as in A ; (4) future-generation basidia, d d, non- 

 protuberant, with less than the maximum diameter, filled with fine 

 protoplasmic contents, and lacking both sterigmata and spores ; 



FIG. 117. Stropharia semiglobata. A dark area of 

 the hymenium with only the spores repre- 

 sented, to show the density of distribution of 

 the basidia of the present generation. The 

 basidia bearing spores are only one-sixth to 

 one-seventh of the whole number. Each side 

 of the square = 0-15 mm. Drawn with the 

 camera lucida. Magnification, 440. 



