Rev. M. J. Berkeley and Mr. C. E. Broome on British Fungi. 377 
perithecium extends all round, being intimately blended with the 
cuticular cells. The cavity is essentially simple, but there is 
sometimes a slight fold or two below, showing a tendency to be- 
come multicellular ; occasionally the centre is vacant, and the 
perithecium then forms an irregular ring. The species would 
probably be comprised by Corda in his Nemaspora, which how- 
ever comprehends more than one distinct form. Sporonema, 
Desm., seems to be the nearest ally of this genus. 
426. D. carbonacea. Perithecio nigro; sporis elongatis sub- 
fusiformibus sub lente prasinis uniseptatis. Phacidium carbo- 
naceum, Fr.! Scl. Suec. no. 210; Berk. Br. Fung. ed. 1. no. 44in 
part. Stilbospora microsperma, Johnst.! Fl. Berw. vol. ii. p. 192. 
Common on dead shoots of sallows. We have this species from 
Paris, communicated by Messrs. Tulasne. 
Forming small scattered disc-like spots covered with the cu- 
ticle, which splits from the centre and ultimately separates. 
Perithecia black, generally excipuliform, but sometimes extend- 
ing all round, and then bursting above with the cuticle. Spores 
oblong, subfusiform, pale yellow-green when seen by transmitted 
light, uniseptate. 
M. Desmaziéres has more than once called our attention to 
the structure of this species, a structure which we had recognized 
soon after its publication in the ‘ British Fungi,’ and of which we 
had previously made an analysis in the following interesting spe- 
cies, with which we have been acquainted many years. We should 
have preferred leaving the matter in his hands, but as he has not 
yet published the genus, and we do not like to omit the follow- 
Ing very singular production, we feel sure that he will pardon us 
in trespassing for a moment on his manor. It is to be observed 
that two things appear under no. 44 cited above, the present 
species, and one with much smaller spores which we have named 
D. microsperma. Pilidium carbonaceum, Libert, which has been 
supposed to be the real plant of Fries, is the same with Cenan- 
gium fuliginosum, Fr. It is not however ascophorous. 
Piate XII. fig. 8. d. Spores magnified 340 diameters. 
427. D. Desmazierti, n.s. Perithecio molli externe hyalino 
intus cyaneo ; sporophoris elongatis ; sporis fusiformibus simpli- 
cibus cyaneis. On twigs of lime, Northamptonshire. 
Forming like the last scattered discs, which however are blacker 
from the spores being darker. Perithecium delicate, hyaline next 
to the matrix, then blue, obsolete above. Sporophores elon- 
gated, strongly developed, sometimes forked. Spores of a beau- 
tiful indigo-blue, truly fusiform, though not much elongated, 
without any septum as far as we have observed, distinctly bor- 
dered, larger than in D. carbonacea. 
