232 The Fungi of Wiltshire. 



Genus CCCY., Pyrenophora Fr. Nucleus slowly formed, im- 

 mersed in a sclerotioid mass, which performs the office of a perithe- 

 cium. Ostiolum at length slightly prominent. Sporidia multi- 

 septate. 



Genus CCCVI., Gihbcra Fr. Perithecium between waxy and 

 horny, at length free, radiato-rimose from the centre. Always 

 closed. 



Gibbera pulicaris Fr., Spye Park, on box twigs. 

 Genus CCCVII., Dichcena Fr. Perithecia subcarbonaceous, 

 elliptic, closed, bursting by a longitudinal fissure. Nucleus and 

 asci diffluent, innato-erumpent. 



Dichcena rugosa Fr., common on living bark of beech and 

 oak. 



Genus CCCVIII., Capnodium Mont. Parasitic. Mycelium 

 creeping, black, consisting of branched, articulated, even, or mon- 

 iliform threads. Perithecia elongated, frequently branched, com- 

 posed of confluent threads, the tips of which are often free at the 

 apex. 



OEDER XXVII. PERISPORIACEI. 



Genus CCCIX., Perisporium Fr. Peridium subglobose, without 

 any manifest thallus or appendages. Asci clavate. Sporidia 

 indefinite. 



Genus CCCX., Lasiohotrys Kze. Erumpent, between fleshy and 

 horny, proliferous, collapsing above, attached to radiating fibres. 

 Secondary peridia ascigerous. Asci cylindrical. 



Genus CCCXI., Sphoerotheoa Lev. Mycelium arachnoid. Peri- 

 thecia globose, containing a single globose ascus. Appendages 

 numerous, floccose. 



Genus CCCXII., Phyllactinia Lev. Parasitic. Perithecia hem- 

 ispherical, at length depressed, seated on a persistent or evanescent 

 membranaceo-granular receptacle. Appendages straight, rigid, 

 acicular, at length bent back. 



Genus CCCXIII., Uncinula Liv. Mycelium floccose. Perithecia 

 globose. Appendages rigid, simple, bifid or dichotomous, uncinate, 

 at length bent upwards. 



