500 



CLASS BASIDIOMTCETEAE 



B 



Fig. 166. Agaricales, Family Agaricaceae. Mechanism in Coprinus for holding gills 

 apart to permit falling of the spores. (A) Coprinus atramentarius Fr. with gills held 

 apart by trabecular cystidia; autolysis beginning at edge. (B) C. slerquilinus Fr. with 

 thickened edges that hold the gills apart. Note the long and short basidia. (Courtesy, 

 Buller: Researches on Fungi, London, Longmans, Green and Co.) 



