144] 



The Classification of Lower Organisms 



Fig. 28. — Basidiomygetes : a. Two germinating basidiosporcs of Agariciis campcs- 

 tris produce mycelia which anastomose freely, the cells becoming plurinucleate, 

 after Hein ( 1930) , x 500. b, c. Young and older basidia of Cystobasidium sebaceum, 

 after Martin (1939). d-g, Eocronartium muscicola after P'itzpatrick (1918); d, fus- 

 ion nucleus; e, homeotypic division in the basidium; f, four-celled basidium; g, pro- 

 duction of basidiospore. h^ i^ i, Basidia of Ustilago Heujlcri, U. Hurdei, and Tille- 



(Continued bottom p. 145) 



