80 



Mycologia 



The occasional breaking apart of the two cells of the spores 

 is also shown by another species, Hypocrea papyracea Ellis & 

 Holw. but in the latter species the stroma is papery and ef¥used. 

 The tendency of the spores to separate at the septum seems to 

 suggest a Hypocrea while the form of the spores is that of a 

 Hypomyces, and the stromatic characters of the two species par- 

 takes as much of the one genus as the other. To me it seems 

 best to place both species in the genus Hypomyces since the 

 form of the spores would suggest a close relationship with the 

 other species of this genus. 



10. Hypomyces papyraceus (Ellis & Holw.) 

 ■Hypocrea papyracea Ellis & Holw. Jour. Myc. 2: 66. 1886. 



Stroma effused, consisting of a thin, membranaceous mycelial 

 growth easily separable from the substratum, of a papery con- 

 sistency, very pale yellow or whitish, 2-3 cm. in diameter ; peri- 

 thecia very minute, about 150 mic. in diameter, subsuperficial, 

 reddish and appearing like minute specks on the surface of the 

 stroma; asci cylindrical, 8-spored ; spores i-seriate with the ends 

 overlapping, fusiform, i-septate, strongly constricted at the sep- 

 tum and often disjuncted and the cells easily separating, espe- 

 cially when removed from the ascus, 10 X 2-3 mic. {pi. 21, f. 15). 



On decaying wood and fungi. 



Type locality : Iowa. 



Distribution : Iowa to Ohio. 



Specimens examined: Iowa, Holway (type); Ohio, Morgan 

 (two collections). 



A specimen received from Mr. Morgan of Ohio before his 

 death as Hypomyces sp. nov. conforms well with the type of the 

 above species. The species is well characterized by the paper- 

 like consistence of the stroma as well as by the very small peri- 

 thecia and the tendency exhibited by the spores to separate at 

 the septum. 



Hypomyces macrosporus sp. nov. 



Stroma consisting of an effused subiculum entirely covering the 

 hymenium of the host and obliterating the gills, pallid or pale 

 ochraceous (in dried specimens), covered over with a pale yel- 

 low powder (spores) ; perithecia numerous and thickly scattered, 



