456 Rev. M. J. Berkeley and Mr. C. E. Broome on British Fungi. 



Fries proposed the name of Cheirospora in the addenda to 

 ' Syst. Orb. Veg/ in 1825, more than ten years before Thyrsidium, 

 Mont., and we therefore adopt his name in preference to Myrio- 

 cephalum, D. Notaris, a name proposed much later than Thyrsi- 

 dium, but in favour of which Dr. Montagne had kindly waved his 

 title to priority. 



442. Pilidium carbonaceum, Lib. = Cenangium fuliginosum, Fr. 

 On willow branches, King's Cliffe, &c. 



This is no Cenangium, being destitute of asci. The spores are 

 falciform and septate. We scarcely think it a good Pilidium, 

 according to Kunze's notion of the genus, taking P. acerinum as 

 the type. 



443. Melasmia acerina, Lev. Ann. d. Sc. Nat. May 1846, 

 p. 276. On leaves of Acer Pseudo-platanus, Beddgellart, Horatio 

 Piggot, Esq. 



Resembling very much a depauperated state of Rhytisma ace- 

 rinum, or rather R. punctatum, but differing greatly in structure, 

 having no asci, but minute oblong spores. 



444. Excipula macrotricha, n. s. Peritheciis hispidis; pilis 

 longis rectis; sporis minimis lunulatis. On dead branches of 

 Ulex europcea. The precise locality has not been preserved. 



Perithecia larger than in the other species, coarsely hispid ; 

 hairs long, thicker than in E. Vermicularia, Corda ; their inner 

 tube separating easily from the outer. Spores far more minute, 

 lunulate. 



A much coarser species than that just mentioned, easily recog- 

 nized by its larger size, coarser hairs, and minute spores. 



445. E. chcetostroma, n. s. Gregaria convexa cinerea ubique 

 setis nigris percursa ; sporis lunatis, subfusiformibus. On dead 

 ash keys, Leigh Wood, Somersetshire. 



Minute, convex, black ; disc rough, with the long inarticulate 

 bristles which everywhere penetrate its substance. Spores on 

 rather long fasciculate or connate sporophores, lunate, subfusi- 

 form, acute at either extremity, pale; endochrome granulated, 

 green under the microscope. 



This is to the genus Excipula precisely what Desmazierella is 

 to Peziza ; but as the species is so much lower in the scale, we 

 consider the protrusion of the bristles through the disc as of less 

 importance, and therefore do not regard it as generically distinct. 

 It is in fact an Excipula in every other respect. We have a closely 

 allied species on some Panicum from South Carolina. 



Plate XI. fig. 2. a. Plant nat. size on an ash key ; b. portion showing 

 the stroma, hairs and spores, with their sporophores magnified ; c. sporo- 

 phores and spores more highly magnified; d. spores very highly magnified. 



446. Dinemasporium gramineum, Lev. Ann. d. Sc. Nat. May 



