SPH.^^ROBOIvUS. 171 



C. vulgar e. Tul. 



Peridium, tawny tan color, externally nearly even, inter- 

 nally quite even, smooth, shining, mouth quite entire, naked. 

 Sporangia pale ochre, whitish ; spores minute. 



Common on hemlock boardwalks and logs. 



Genus XIII. NIDUI^ARIA. Tul. Imbedded Birdsnest. 



Peridium globose, sporangia numerous, small, enveloped in 

 mucous. 



N. pisiformis. Tul. 

 Csespitose in a nest, globose, rootless, brown. 

 Sporangia, subrotund, dark brown, spores colorless, 



elliptical. 



On old logs throughout the Valley all summer. 



Genus XIV. SPH^ROBOI^US. Tode. 



Peridium double, an inner one which is elastic, and when 

 ripe ejects the sporangia for some distance. 



S. stellatus. Tode. 



Globose, pale yellow, outer peridium of two coats lined by 

 an inner elastic one. The outer peridia split in a stellate 

 manner, and the inner suddenly inverts itself and throws the 

 sporangia to a considerable distance. 



Not common in the Valley. Found specimens in Spring Creek woods. 



