209 
TYLOSTOMA SEMISULCATUM. Peridium subglobose, usually a little 
longer than broad, 6 to 8 lines broad, Q lines long, glabrous above, 
ferruginous-tomentose on the lower half ; ostiolum entire, stem 
equal, about 2 in. long, even and glabrous or but slightly furfur- 
aceous on the upper part, the lower part longitudinally sulcate, © 
‘whitish; spores ferruginous, globose, .00016 to .0002 in. broad; 
threads of the capillitium colorless, not septate. 
Sandy soil. Nevada. Collected by C. W. Irish; communi- 
cated by T. Taylor. ares 
This species is separated from 7. mammosum Fr. by its peri- 
dium, which is tomentose on the lower half and not depressed, and 
by its stem, which is distinctly furrowed’in its lower half. 
Lycoperpon BEtui. Peridium about 2 in. broad, subglobose, 
sessile, grayish or yellowish-brown, exterior peridium continuous, 
adorned with numerous persistent hard angular irregular or sub- 
stellate warts which are smaller toward the base, separable at ma- 
turity from the inner peridium and falling away in flakes or patches; 
the inner peridium thinner, paler, glabrous; capillitium composed 
of long slender interwoven, slightly colored: and occasionally 
branched filaments, a little broader than the diameter of the spores; 
_ Spores globose, olive-brown, .00024 to .00028 in. broad. 
Rocky ground. Digges Island, Hudson’s Bay. August. Col- 
lected by R. Bell; communicated by Prof. J. Macoun. 
This puff-ball is peculiar in its continuous but warty exterior 
peridium, which is less friable than that of Z. separans, The peri- 
dium appears to rupture irregularly, as in Calvatia. It is also well 
marked by the dark olive-brown spore mass. 
Excipurina opscura. Perithecia cupulate, 14 to ¥ line broad, 
Sessile, black, the margin at first incurved, then erect, thin ; hyme- 
nium subgelatinous; spores subfiliform, curved, plurinucleate or 
obscurely pluriseptate, hyaline, .oo12 to .0018 in. long, .00016 
road, supported on short sporophores. 
Bark of hemlock trees, Tsuga Canadensis. Newfoundland. 
Waghorne. 
_ MEtrasmia imitans. Perithecia hypophyllous, membranous, 
variable in size and shape, commonly subelliptical or oblong, some~ 
What confluent in nerve-following lines, rugosely uneven, black, 
_ pening irregularly ; spores subcylindrical, straight or nearly so, 
_ Colorless, sometimes obscurely plurinucleate, .0008 to .oor2 in, 
long, .00016'to .0002 broad, oozing out and forming pallid globu~ 
‘ar or irregular masses or short thick tendrils. 
