758 Transactions of the Society. 



This species agrees with B. confluens in the large spinulose 

 spores and fasciculate capillitium, but differs in the sporangia not 

 being confluent and the white columella. 



The spores of Lycogala epidendriim Bux. are not smooth as 

 described in Cooke's ' Myxomycetes of Great Britain,' but distinctly 

 waited ; the same remark is also true of Prototrichia flagellifer 

 B. and Br. 



Sporidesmium atrum Link. (fig. 19). " Tufts scattered, black, 

 pulverulent, true stroma absent ; spores oblong, attenuated at both 

 ends, transversely 3-4 septate, 4-5 celled, slightly constricted at 

 the septa, epispore smooth, brown, pedicel white, diaphanous." 



While examining some sections of Euti/pa scahrosa Fckl., a few 

 spores were observed which resembled those of some Phragmidium, 

 but the habitat — on bark of sycamore — did not favour this idea ; 

 and on further examination, they were found to agree in every 

 particular with Corda's figure and description of Sporidesmium 

 atrum Link, as given in his ' Icones Fungorum,' vol. vi. t. i. f. 14. 

 As detached spores only were seen, Corda's description of the 

 species is given. New to Britain. 



Stilhum jlexuosum n. sp. (figs. 1-3). Gregarious; black; head 

 clavate, then globose, smooth ; stem long, filiform, often flexuous or 

 geniculate, a little thickened at the base ; conidia colourless, sub- 

 globose. 



On rotten wood, Scarborough. About a line high, head viscid, 

 so that when placed in water the conidia disperse very slowly. 

 Septate threads of stem bright brown by transmitted light. Allied 

 to 8. rigidum P., but differing in the flexuous stem and black head. 



Hehnintliosporium pumilum n. sp. (figs. 4 and 5). Fasciculate 

 or scattered ; stem simple, subulate, straight, with about four septa, 

 base dark brown, opaque, becoming paler and pellucid towards the 

 apex ; conidia broadly obovate, at first pale, then pitch brown, 

 opaque, shining, without septa. 



Parasitic on all parts of Stilhum jlexuosum. Scarborough. 



Very minute, head shining like a black glass bead. Belated to 

 S. ohovatum Berk., but readily distinguished by its habitat and 

 eseptate conidia. I have seen what appears to be the same, or a 

 very closely allied species, parasitic on a new and very remarkable 

 Hepatic (Mytilopsis albifrons Spruce), collected by Dr. Spruce in 

 the Peruvian Andes. 



Helmisporium stemphylioides Corda. This species was found 

 some years ago near Scarborough and determined by Mr. Phillips, 

 but owing to some oversight, has not up to the present been 

 recorded as British. 



Arthrohotrys rosea n. sp. (figs. 6 and 7). Tufted ; pale rose 

 colour ; fertile flocci erect, sparingly septate, with from three to 

 five swollen nodes at equal distances, each node bearing a globose 



