AGARICUS 461 



Sections should also be made through the hymenium of some 

 species of Polyporus in such a way as to cut the pores transversely : 

 examination of these will show the hymenial layer lining the 

 pores, and consisting, as in the mushroom, of paraphyses and 

 basidia, the latter producing sterigmata, and spores ; but in 

 Polyporus the hymenial layer is less closely packed and regular. 



A comparison should also be made of some types of the Gastero- 

 mycetes, e.g. Lycoperdon, Geaster, Crucibulum, and Phallus. In 

 these forms it will be seen that there is considerable variety in 

 detail of arrangement of the hyphse, resulting in a marked differ- 

 ence of external conformation of the mature Fungus. Still, sections 

 of them in relatively young stages will show that they also are 

 composed of branched and septate hyphse, while the mode of 

 formation of the spores on the basidia of more or less regular 

 internal hymenial layers, corresponds essentially to that already 

 described for the mushroom. 



Dacryomyces may also be examined as an example of the 

 Tremellini. It appears as gelatinous orange masses on rotting 

 wood, especially of the Pine. Sections of it will show the 

 deliquescent nature of the fungus, the hyphse having a gelatinous 

 outer layer of the cell-wall. The spores, borne in pairs upon 

 basidia, may be seen at the surface of the thallus. 



