iqiq] 



WALKER— PLUTEUS AND TUBARIA 



Fig. 4. — Structure of trama and origin of cystidia and basidia: A, reconstruction, 

 made by aid of microscope, of photomicrograph shown in fig. 47a; B, another gill from 

 same series outlined with camera lucida. 



Fig. 5. — Origin of cystidia and basidia as seen in slightly older basidiocarp than 

 that of text fig. 4: A, reconstruction of part of photomicrograph shown in fig. 48, 

 made by aid of microscope; outlines of other drawings made with camera lucida. 



