TILLETIA TRITICI 



239 



of as a basidium. The secondary conidia of Brefeld and others will 

 be called basidiospores, and the primary conidia of Brefeld and 

 others sterigmata. The shafts of the sterigmata which crown the 

 promycelium will be referred to as primary sterigmata, while the 

 short conical branch which an H -shaped pair of primary sterigmata 

 puts out laterally and which bears a basidiospore will be referred 

 to as a secondary sterigma. The promycelium is homologous with 

 the basidium-body of the Hymenomycetes and the Uredineae. The 

 basidiospores which are produced on the secondary sterigmata may 

 be called primary basidiospores and those which are produced on 

 a mycelium secondary basidiospores. The sterigmata which bear 

 these secondary basidiospores may be referred to as mycelial sterig- 

 mata or simply as sterigmata. 



The new and the old or Brefeldian terminology, as used for 

 Tilletia tritici, may be summarised in tabular form as follows : 



Terminology for Tilletia tritici. 



Now proposed 



Basidium - 



Basidium-body 

 Primary sterigma 



Secondary sterigma . 

 Primary basidiospore . 



produced from a primary 



basidiospore, or a conju- 



Mycelium^ gated pair of primary 



sterigmata, or a secondary 



basidiospore. 



Mycelial sterigma .... 



1 produced on a 

 Secondary basidiospore J , mycelial 



sterigma. 



Brefeldian 



[Promycelium. 

 Basidium -j Primary conidium or basi- 



( diospore. 

 Sterigma. 

 Secondary conidium. 



Mycelium 



produced from a secondary 

 conidium or a conjugated 

 pair of primary conidia. 



Sterigma, produced on a mycelium. 



Secondary conidium. 



Nuclei and Sex. — A few remarks will now be made on the nuclear 

 condition and sexual processes of Tilletia tritici. The new termin- 

 ology will be employed. 



