POKPHYROSPOBAE. 



351 



FIGURES ILLUSTRATING THE POBPHTROSPOBAE. 



Fig. 1, Agaricus campestris, section of portion of fungus, showing the 

 free gills and the ring surrounding the stem ; about half nat. size ; 

 Fig. 2, Agaricus comptulus, a fully developed specimen ; nat. size ; 

 Fig. 3, Stropharia aeruginosa ; half nat. size ; Fig. 4, Chitonia rubriceps, 

 a specimen showing the large volva at the base of the stem ; nat. size ; 

 Fig. 5. section of pileus of same, showing the free gills and the hollow 

 stem ; nat. size ; Fig. 6, Pilosace Algeriensis, section of a portion of the 

 pileus, showing the free gills and the tissue of the stem differentiated from 



