Peck : NEW SPECIES OF FUNGI 101 
fragile, equal or nearly so, hollow, shining, fibrillose, striate and 
whitish at the top, brownish below ; spores subelliptic, obscurely 
angular or slightly irregular, 1o long, 6 » broad. 
Pileus 2—3 cm. broad; stem about 2.5 cm. long, 2—3 mm. thick. 
Grassy places. Boston, Massachusetts. June. S. Davis. The 
species is closely related to /nocybe decipiens Bres., but it differs in 
the color of the pileus, in the hollow stem and in the smaller spores. 
Naucoria sororia 
Pileus fleshy, fragile, convex, broadly umbonate, glabrous, 
lacunose, subviscid, tawny, often with a slightly darker zone near 
the margin when moist, even, wavy, or slightly lobed on the 
margin, flesh firm, watery, white, taste and odor farinaceous ; 
lamellae narrow, close, adnate, whitish becoming darker with age 
and in drying; stem equal or slightly bulbous, flexuous, fragile, 
striate at the top, stuffed, pale-tawny, white within ; spores elliptic, 
10-124 long, 6-8 p broad. 
Pileus 5-10 cm. broad; stem 4-12 cm. long, 4-8 mm. thick. 
Solitary or gregarious; in open grassy places. Falmouth, 
Massachusetts. July. S. Davis. This species is related to Nau- 
coria semiorbicularis (Bull.) Fr., from which it may be distinguished 
by its lacunose pileus, its farinaceous odor and taste, and its fragile 
character, and by its stem being striate at the top. 
Psathyrella betulina 
Pileus thin, submembranous, fragile, conic or convex, some- 
times broadly umbonate, glabrous, atomate, hygrophanous, fus- 
cous or dark-brown when moist, paler when dry ; lamellae broad, 
adnate, subdistant, cinereous becoming black, white on the margin ; 
stem fragile, equal, hollow, glabrous, shining, white ; spores black, 
elliptic, 8-10 » long, 5-6 » broad. 
Pileus 1.2-2.5 cm. broad; stem 2.5—5 cm. long, I-2 mm. 
thick. 
4 Decaying branches of white birch. Stow, Massachusetts. Sep- 
_. tember. S. Davis. 
7 Hydnum sulcatipes 
Pileus fleshy but thin, convex or nearly plane, glabrous ; aculei 
d at the base and occasion- 
f the pileus, whitish, 
. qual, sulcate, the ridges some- 
times branched ; spores subglobose or broadly elliptic, 7-8 # long, 
nearly or quite as broad. 
