Rev. M. J, Berkeley and Mr. C. E. Broome on British Fungi. 381 



941. Coryneum macrospermum, n. sp. Stromate minuto pul- 

 viiiato; floccis sursuin I'urcatis; sporis subcylindricis 4-5-sep-' 

 tatis, articulis extremis byalinis. 



Didymosporium niacrospernium, Corda, Fasc. 6. f. 17. 



On elm-poles. Batheaston, Jan. 185.2. 



Forming little scattered sj)ots on the surface of the wood. 

 Stroma cellular; thread cylindrical, equal, forked above. 



This is clearly the plant of Corda, though more highly deve- 

 loped. 



Plate XV. fig. 12. Plant, nat. size; a, the same, slightly magnified j 

 b. vertical slice, showing spores and sporophores; c. the same, showing 

 the branching of the sporophores ; d. mycelium ; e. spores. (All more or 

 less magnified.) 



94.2. Septonema irregulare, n. sp. EfFusum, tenue, nigrum, 

 irreguJare; sporis oblongis. 



On living apple-twigs. Apethorpe, Northamptonshire. 



Forming a very thin, cloud-like, black stratum ; very irregular, 

 sometimes exhibiting continuous threads under the microscope, 

 sometimes distinct spores "OOOZ-'OOl inch long. 



Plate XV. fig. 1.3. Spores magnified. 



943. Arthrobotryum stilboideum, Cesati in Hedwigia, tab. 4. 

 fig. 1. On a pollard willow. Langridge, Som., April 1859. 

 Spores '0005 inch long. 



*Monotospora megalospora, B. & Br. no. 759. A form has 

 occurred, on an old stump, with broadly fusiform spores "0012 

 inch in diameter. We do not consider this distinct, because other 

 spores occur which are precisely of the same form as those we 

 have figured in the place indicated above. 



944. Helminthosporium oosporum, CovCiSifY-ei&c. l.f. 200. On 

 sticks. East Bergholt, Rev. C. D. Badham, Feb. 2, 1852. 



945. H. apiculatum, Corda, Fasc. 1. f. 191. On dead wood. 

 Twy cross. Rev. A. Bloxam. 



946. H. dendroideum, n. sp. Floccis ereetis sursum attenuatis 

 articulatis, ramulis brevibus, sporis apicalibus oblongo-subfusi- 

 formibus multiartieulatis. 



On maple. Batheaston, C. E. Broome, Feb. 12, 1857. Also 

 in South Carolina. 



Threads attenuated upwards, articulated; each joint above 

 giving off one or two short branchlcts terminated, by an oblong, 

 subfusifonn, slightly curved, multiarticulate spore '0024 inch 

 long, each joint containing a globose nucleus. 



Distinct from all other species except //. arbuscula, Berk. & 

 Curt., which differs in the peculiar branchlets and shorter spores. 

 The characters of //. arbuscula are as follows : — 



Floccis ereetis subsequalibus sursum ramulosis ; ramulis bre- 

 vibus lagengeformibus inarticulatis; sporis fusiformibus. 



