HYMENOMYC&TES. 



327 



come densely felted into tough masses five to ten or more 

 millimetres in thickness, and of many centimetres in 

 breadth and length ; it frequently also becomes compacted 



Fig. 226. A, cross-section of the gills or lamella; (/), of Agaricus camptsttris ; h, 

 portion of pileus ; B, section of one of the gills, more highly magnified ; t. the cen- 

 tnil tissue of the gill (trama) ; sh,, the snb-hyinenial layer of short, rounded cells; 

 /t !t. hyineniiim. C', a small portion of B, more highly magnified ( < 550) ; t. trama ; 

 sh, siib-hyinenwl layer; q. young basidiu nnd paraphyses ;', basidium with spores 

 in earliest stage ; x", basidium with spores nearly ripe ; *'", basidinm with ripe 

 spores ; s"", basidium from which the ripe spores have fallen. After Sachs. 



into cylindrical root-like forms (Fig. 225, A, m). Upon the 

 mycelium there arise, after a longer or shorter period of vege- 

 tation, small rounded or oblong masses, the young sporo- 



