4i2 B ay liss- Elliott and Grove. — Ro ester i a pallida, Sacc. 
5 e ser., iv. 294). The blackish stem attributed to the latter is merely the result 
of age. It is true that many of the specimens of P. Peter sii have a relatively 
larger and whiter head than some of P. faginea, but also specimens of which 
exactly the opposite may be said are not uncommon. No other specific 
distinction worthy of notice is even alleged, unless it be the more flexuous 
conidiophorous hyphae of P. faginea , and that is not evident in all the 
Fig. 7. A young ascus, an ascus dehiscing, and a young paraphysis. x 800. Fig. 8. Spores: 
a, seen lying on their flattened surface ; b, seen in profile, x 800. Fig. 9. A very young ascophore, 
no asci present, only paraphyses. x 90. 
specimens. The spores are exactly the same in both, being yellowish- 
brown (snuff-coloured in mass) and bun-shaped, that is, convex above and 
flattened or even slightly umbilicate beneath, where there is often to be 
seen the remains of the very short sterigma still attached (Figs. 10 and 11). 
Corda’s figures of the spores of his Botryochaete faginea (Icon, vi, f. 95) agree 
with Brefeld’s figures of his conidial stage of P. Peter sii, at any rate in their 
older state, for the apiculus at the base of Brefeld’s conidia is only distinct 
