274 BRITISH DISCOMYCETES. 



On Hypoxylon multiforme, etc. 



Minute, gregarious, crowded (Fries, I. c). 



I have seen several things under this name, but none 

 of them appear to me to answer the description. The 

 Rev. M. J. Berkeley says some of the specimens referred 

 formerly to this species certainly belong to Helotium 

 pruinosum (Jerd).* 



Name — twi, upon, acpaipa, a sphere; growing on a 

 Spkceria. 



Doubtful species. 



70. Lachnella plano-umbilicata. (Grev.) 



Small, sessile, gregarious, whole plant white, globose- 

 concave, at length quite plain ; ciliated with horizontal 

 white hairs at the margin ; hymenium gently umbilicate. 



Peziza plano-umbilicata — Grev., " Flo. Eclin.," p. 420 ; 

 "Eng. Flo./' v. p. 198; Cooke, " Hanclbk.," 2054 



On dead nettles. 



Wholly white, remarkably plane, with a small dimple 

 in the centre of the hymenium, which in old age 

 assumes a yellowish tinge. The external surface is 

 covered with white hairs, which form a beautiful ciliated 

 margin not in the least raised. The margin is so 

 irregular, that if there had been fewer cilia it might 

 have been called pectinate (Grev.). 



As far as I know, there exists no authentic specimen 

 of this either in the Edinburgh University Herbarium or 

 in the Kew Herbarium. 



Subgenus III. — Fibrina. Fries. 



Cups sessile or subsessile ; externally flbrose-striate 

 with adpressed hairs ; epiphytal. (Plate VIII. fig. 49.) 



Name — Fibrinus, of a beaver ; from the felty texture 

 of the receptacle. 



Arrangement of the SrECiES, 



a. Sporidia elliptic .. .. .. .. species 71,72 



b. Sporidia oblong . . . . . . . „ 73 



* B. and Br., "Aim. Sc. Nat.," No. 1174. 



