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 Ncemaspora, 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. 44 in 

 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. Desmazieres 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. 



Plate XII. fig. 8. d. Spores magnified 340 diameters. 



427. D. Desmazierii, 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, larircr than in D. carbonacea. 



