State Museum of Natural History. 



115 



like the pileus; spores elliptical, .0002 to .00025 in. long, .00012 to 

 .00016 broad. 



Pileus 6 to 12 lines broad; stem 1 to 2 in. long, about 1 line thick. 

 Mossy ground in woods. North Elba. Sept. 



I have separated this form G. ditopoda because of the striate margin 

 of the pileus, paler lamellae and longer elliptical spores. 



Collybia butyracea, Bull. 

 Common in groves of spruce and balsam trees. North Elba. Sept. 



Collybia acervata, Fr. 



Woods. North Elba. Sept. G. simiUima Pk. is doubtless a mere 

 form of this species. G. spinulifer Pk. differs in the spinules of the 

 lamellae. 



Collybia ignobilis, Karst. 

 Mossy ground in balsam groves. North Elba. Sept. 



Omphalia striaepileus, Fr. 



Groves of spruce and balsam. North Elba. Sept. 

 The specimens differ from the description of the species only in 

 color. They are dingy whitish when moist, white when dry. 



Omphalia tubseformis, n. sp. 



Pileus submembranous, glabrous, deeply umbilicate, grayish, the 

 margin decurved or spreading, lamellae distant, deeply decurrent, 

 white, sometimes branched, with venose interspaces; stem short, equal 

 or tapering downward, hollow, subpruinose, blackish-brown toward 

 the base; spores elliptical, .0002 in. long. 



Pileus 8 to 12 lines broad; stem 6 to 10 lines long. 



Dead bark of willow. Menands. June. 



Pleurotus mitis, Fers. 

 Prostrate trunks of balsam, Abies bahamea. North Elba. Sept. 



Hebeloma firmum, Pers. 

 Woods. North Elba. Sept. 



Naucoria scirpicola, n. sp. 



[Plate 2. Figs. 6-10.] 



Pileus membranous, at first hemispherical and tomentose, then 

 convex or nearly plane, glabrous or adorned with a few floccose, 

 superficial scales, widely striate on the margin, tawny or subochra- 

 ceous, subatomate when dry; lamellae subdistant, slightly adnexed, 



