B ay liss- Elliott and Grove. — Roesleria pallida , Sacc. 413 
when they are young ; the umbilicate base appears to us to arise only when 
the spores are perfectly mature and ready to fall off. 
The sole difficulty in the way of this identification is that Corda 
figures (1. c.) swollen * basidia ’ bearing 1-4 transversely placed spores, 
but he figures these on the same hyphae as others which look like spherical 
conidia, although he does not himself differentiate them in his description ; 
while Brefeld’s £ basidia ’ are elongated and transversely septate, but the 
spores are identical in shape, pose, and colour. No signs of any such 
structures were seen by us, except in a very indefinite and evidently casual 
way. Nevertheless, P. faginea abounded in the very same clamp-con- 
nexions (Fig. 10) and short lateral branches growingbeside them (Brefeld’s 
Fig. 10. Pilacre faginea. A portion of the hyphae forming the head, showing the ‘ buckle ’ 
arrangements, just as figured by Brefeld for Pilacre Petersii , and also conidia attached and free, 
x 800. Fig. 11. Pilacre Petersii. Spores in face-view and profile, x 1,000. 
‘ basidia ’), exactly as figured by him in his P. Petersii. Both kinds 
of ‘ basidia ’ appear to us to have little or nothing to do with the real 
basidia of the Basidiomycetes. 
Stilbum pilacriforme , Richon (Bull. Soc. Bot. Fr., 1882, xxix. 241), 
which may not differ very much from a species of Pilacre , was considered 
by its author to be the conidial stage of R. hypogaea , occurring several 
months before the ascophorous stage appeared. It seems likely also that 
several species of Pilacre described by Berkeley, P, tepJirospora , P. orientalis, 
P. depressa (not to mention others) may well be nothing but forms of 
P. faginea , but no specimens of these have been examined. It is not 
impossible that the whole of the species mentioned in this account should be 
included under the one title, R. pallida , Sacc. There remain as probably 
distinct species R. hyalinella , R. Candida , and R. crocata , for R. onygenoides y 
