54 Transactions British Mycological Society. 
the receptacles is very variable, being sometimes hydnoid, 
sometimes attenuated at the base or substipitate, claviform or 
obovate, always more or less angular, and sometimes in the 
form of erect laminae, obovate, and bi-trilobed. 
These small fruit bodies have one or more long hyaline hairs 
projecting at the apex or at the side. In their subsequent de- 
velopment, either by lateral growth or by the intercalation of 
new tubercles, they become confluent in a net-like manner and 
finally acquire the form of a continuous pellicle. The plant then, 
when growing well, is seen as a crystalline pellicle, surrounded 
by a more or less wide net-work, which resolves itself at the 
margin into distinct corpuscles. When dry, the reticulate por- 
tion resembles a delicate lace thread. 
In the most perfect specimen examined, the cystidia are 
100-130 x 7-15 and project up to 60 p: they are accompanied 
by numerous gloeocystidia 3 to 7 » in diam. which either project 
slightly or not at all. These gloeocystidia are linked by a series 
of gradations with the simple or branched paraphyses 1-5-3 p 
in diam. or with the fertile hyphae which bear more or less 
elongated and club-shaped basidia. The hyphae, gloeocystidia 
and cystidia are bunched together at the base in tufts, as is 
usual in all species which start with a scattered growth and 
become confluent subsequently. 
In certain parts of the trama, originating in the substratum, 
are found groups of pyriform vesicles 9-27 x 7-15; these 
vesicles are not always present, but on the wood near one 
specimen of Heterochaetella, without however touching it, were 
found small grey pruinose patches which were entirely composed 
of these tufted vesicles. Is this a distinct species or can one 
look upon these vesicles as a sclerotic state comparable with 
Aegerita candida Pers. in its relation to Peniophora aegerita 
v. Hoehn. et L.? | 
