254 



RESEARCHES ON FUNGI 



many Leucosporae, such as species of Armillaria, Collybia, and 

 Marasmius. 



Species of Agaricineae having Mottled Gills. 



Melanosporae . 



Porphyrosporae 



Ochrosporae 



(Panaeolus campanulatus 

 ,, papilionaceus 

 iAnellaria separata 

 Psilocybe ericaea 

 ,, foenisecii 

 ,, semilanceata 

 Hypholoma fasciculare 

 ,, velutimim 



,, pyrotrichum 



Stropharia semiglobata 



,, aeruginosa 

 Psalliota campestris 

 ,, arvensis 

 ,, silvatica 

 Cortinarius arvinaceus 



,, collinitus 

 Crepidotus mollis 

 Flammula carbonaria 

 Pholiota mutabilis 



If the spores of a Panaeolus were colourless instead of black, 

 the underlying organisation of the hymenium would not be altered : 

 it would simply be more difficult to detect. The areas with more 

 advanced spore-bearing basidia would be light in colour just like 

 the areas with less advanced spore-bearing basidia, and one would 

 not be able to observe the difference by the appearance of the 

 exterior of the spores. In order to discover the mosaic- work 

 really present, it would be necessary to watch the development 

 of the hymenium for a considerable number of hours directly 

 with the microscope. Now, in the Leucosporae, the spores are 

 colourless, and the question arises whether any of the species 

 in this very large family have the hymenial organisation charac- 

 teristic of the Panaeolus Sub-type. Examination of a number of 



