144 



TABULAR ARRANGEMENT 



PYREXOPHORA, Fr. 



GIBBERA, Fr. 



1 Brit. sp. 



3 Brit. sp. 



DICH^NA, Fr. 



2 Brit. sp. 



CAPNODIUM, Mont. 



1 Brit. sp. 



Order XXIX. PERISPORIACEI. 



Perithecia free, often surrounded by threads ; asci 

 springing from the base. 



PERISPORIUM, Fr. 



Genera. 



MICROSPHJERA, Lev. 



2 Brit. sp. 



LASIOBOTRYS, Kze. 



2 Brit. sp. 



SpaEROTHECA, Lev. 



2 Brit. sp. 



PHYLLACTINIA, Lev. 



1 Brit. sp. 



UNCINULA, Lev. 



2 Brit. sp. 



3 Brit. sp. 



ERYSIPHE, Hedw. 



1 Brit. sp. 



CHJETOMIUM, Kze. 



3 Brit. sp. 



ASCOTRICHA, Berk. 



1 Brit, sp- 



EUROTIUM, Link. 



1 Brit. tp. 



Order XXX.-01SrYGENEL 



Peridium of closely woven threads ; sporidia in a com- 

 pact dusty mass. 



Genus. 

 ONYGENA, Pers. 



3 Brit. sp. 



