164 LYCOPERDACE^. 



Genus VI. MITRBMYCBS. Nees. 



Mycelium composed of numerous cord-like glutinous fibres, 

 which branch and anastomose, forming a rooting base. 



Peridium subglobose, composed of different layers, the outer 

 one torn into segments. Mouth a stellate fissure of half a 

 dozen rays. Capillitium threads long, slender, hyaline. 



There is only one species of this genus. 



M. lutescens. Schw. 

 Characters same as the genus. 

 Found specimens in Minesite woods, near Allentown, Pa. 



Genus VII. BOVISTA. Dill. 



Peridium membranaceous, persistent, bark distinct, at length 

 shelling off. Capillitium adnate to the inside of the peridium. 

 Spores pediculate or sessile. 



B. pila. B. & C. 



Peridium, globose, sessile, with a stout mycelium ; cortex 

 thin, white at first then brown. 



Capillitium, firm, compact and persistent, at first clay 

 colored, at length purple brown. 



Found specimens in Spring Creek woods. Identified by A. P. Morgan, 

 Ohio. 



Genus VIII. ClyAVATIA. Fr. 



Peridium large, sessile ; cortex thin, adherent. Inner per- 

 idium thin and fragile, breaking up into fragments from above 

 downward. Spores and capillitium in a dense mass. 



