McCallum : Bulgaria platydiscus in Canada 295 



standige Art zu erachten." The spore measurements given for 

 6^. globosum are 8-10 long and 5-6 ft wide. Sarcosoma and Bul- 

 garia are synonymous. 



Central Experimental Farm, 

 Ottawa, Canada. 



Explanation of Plate 14 



A, young and mature apothecia of Bulgaria platydiscus ; B, section through 

 the wall of the apothecium showing (i) the felty layer of brown, multiseptate 

 hyphae, (2) the single row of rounded, pseudoparenchymatous cells, and (3) 

 the network of hyphae which permeates the jelly-like contents of the apo- 

 thecium ; C, drawings to show a few of the curious forms assumed by the 

 hyphae in 5, 3 ; D, asci and paraphyses, the tips of the latter slightly club- 

 shaped ; some mature spores and various stages in their germination. 



