246 RESEARCHES ON FUNGI 



for handling with such apparatus as it was desirable to use. 

 Lastly, the gills exhibit in a marked manner the phenomenon of 

 mottling, which had not hitherto been investigated (Fig. 84). 



The material was obtained in the first place from England. 



FIG. 83. Panaeolus campanulatus. Three fruit-bodies grown 

 on horse dung in a pure culture in the laboratory. Natural 

 size. 



In the month of August, 1911, some horse dung infected with the 

 mycelium of Panaeolus campanulatus was procured from a field 

 and allowed to dry. Subsequently it was taken to Winnipeg, 

 where in February, 1912, i.e. some six months after it had been 

 dried, it was again moistened. The wetted dung-balls were placed 

 in a large crystallising dish, which was covered with a glass plate 

 to check evaporation and set upon a table in the laboratory. 



