

,:-^!^^521M,»,,^t^„^^^^^^^^^^^--^ 



Fig. 4$. — Polyporus sulpkureus. i, an entire fungus about ot^e- 

 quarter nat. size ; is, section through the same, showing the thick, 

 fleshy pilaus at a, and the tubes, which have the cavity hned with 

 the hymenium, or spore-bearing surface, at ^; 3, a basidium bearing 

 four spores, X 300. 



