SPIIyERONEMEI. 319 



2. carbonaceum, Lib. (no. 442). Cenangiiim fuligiuosum, Fr. Not, 

 however, a good Pilidium. On dead willow-twigs. 



113. MELASMIA, Lev. 



Perithecium membranaceous, deliisccnt above, rather swol- 

 len, at length depressed and rugose, growing in a thin, spot- 

 like, effused receptacle. Spores minute. 



1. acerina, Lev. (no. 443). On living sycamore-leaves. 



2. ahiea, Lev.; Grev. t. 146./. 2. On living alder- leaves. 



114. PIGGOTIA, B. and Br. 



Perithecia irregular, very thin, obsolete below, forming by 

 confluence a wrinkled mass, bursting by a lacerated fissure. 

 Spores rather large, obovate, at length tomiparous. 



1. astroidea, B. and Br. (no. 503). On living elm-leaves. 



115. SEPTORIA, Fr. 



Perithecia minnte, more or less incorporated with the ma- 

 trix. Spores oblong and septate, or thread-shaped and conti- 

 nuous, discharged in little tendrils. 



* Spores septate. 



1. Ulmi, Kze. ; Grev. t. 112. On living elm-leaves. 



2. OxyacanthfE, Kze. On living hawtliorn-leaves. 



3. Aceris, B. and Br. (no. 432). On living sycamore-leaves. 



4. saliceUa, B. and Br. (no. 746). On willow-twigs. 



* Spores not septate. 



5. ^gopodii, Desm. On living leaves of yEff. Podagraria. 



6. Lepidii, Desm. (no. 431). On living leaves of Lepidium SmWiii. 



7. nodorum, B. (no. 433). On joints of nearly ripe wheat-stalks. 



8. Hippocastani, B. and Br. (no. 4c^ ■is). On living leaves of horse-chestnut. 



