“434 Rev. M. J. Berkeley on British Fungi. 
perhaps it may be the same with Cephalotrichum curtum ; but 
under a magnifier of 600 diameters I cannot see this clearly 
enough to make it part of the specific character. 
Tas. XIII. fig. 16. a, S. nigrella, nat. size; b, c, single plants ; d, sporidia, 
highly magnified. 
*227. Sporocybe alternata. Aspergillus alternatus, Berk., 
Ann. of Nat. Hist., vol. i. p.262. This species, on more ma- 
ture reflection, certainly belongs to the genus Sporocybe, as 
the sporidia are not arranged in moniliform threads. 
228. Sporocybe lobulata, n.s. Atvra, filis proliferé ramosis ; 
ramulis subalternis attenuatis; apicibus 4—5 lobulatis ; spo- 
ridiis ellipticis, echinatis levigatisque, binucleatis. On a 
coarse linen cloth on a heap of-rubbish. King’s Cliffe. 
From the articulated creeping mycelium spring slender very 
minutely scabrous threads, branched proliferously; ramuli 
often alternate, attenuated, their apices swelling into a pyri- 
form 4—5-lobed receptacle, from which spring elliptic sporidia, 
some of which are echinulate, others smooth with two nuclei. 
Nearly allied to the last, but it is at once distinguished by 
the lobed tips of the branchlets. It appears also to have a 
great resemblance to Stachybotrys atra, Corda, but the lobes 
are not so distinct; neither are they mammillate, and the sporidia 
have no trueseptum. There isa species of Periconia (= Spo- 
rocybe, Fr.), figured by Corda, with a lobed receptacle, but 
very different in other respects. 
Tas. XIII. fig. 17. a, Portion of S. lobulata; 6, a portion of one of the 
threads; c, one of the lobed tips; d, sporidia: all highly magnified. 
229. Helicosporium vegetum, Nees. Syst. p. 68. f. 69. On 
decayed oak branches. Morehay Lawn, in Rockingham Fo- 
rest, Norths. 
*230. Helminthosporium Tilia, Fr. Syst. Myc. vol. 3. p. 361. 
Dr. Greville’s figure does not give a good notion of this plant, 
which is certainly an Helminthosporium. Besides the filiform 
and clavate flocci, there are distinct oblong biseptate sporidia, 
supported by a minute peduncle. 
Tas. XIII. fig. 18. a, flocci; b, sporidia: highly magnified. 
231. H. foliculatum, Corda, Ic. fase. 1. t. 3. fig. 180. On 
stems of umbelliferous plants and cabbage-stalks. King’s 
Cliffe. ; 
232. H. obovatum,n.s. Floccis subulatis, multi-articulatis, 
subeequalibus ; sporidiis obovatis, fuscis, biseptatis. On old 
planks exposed to wet. 
Forming a short dense velvety-black stratum ; flocci very 
slightly attenuated, subulate, either nearly straight or slightly 
flexuous. Sporidia broadly obovate, with two dissepiments, 
