118 FUNGUS-FLORA. 



Type specimen examined. 



The present species possesses so many points in common 

 with Scleroderris rubi, that I am by no means certain that it 

 may not eventually prove to be a stage of the last named. 

 The spores, certainly, so far as I have observed, are perma- 

 nently continuous, but further observations may modify 

 character. In Cooke's diagnosis the measurement given for 

 the spores is too large. 



The distinguishing points of the present species, as at 

 present understood and contrasted with S. rubi, are : caespi- 

 tose habit, slightly larger spores, less orange in colour, and 

 growing on oak bark. 



Cenangium umbrinum. Mass. 



Caespitose, erumpent, turbinate and closed at first, soon 

 expanding; disc nearly plane, umber, nearly black when 

 dry; externally tawny then cinnamon, minutely scurfy, 

 margin often more or less wavy, 1-2 mm. across ; asci, 

 cylindrical, 8-spored; spores elliptical, 1-guttulate at first, 

 smooth, continuous, hyaline at first, then faintly tinged 

 brown, 15-16 X 7 /x ; paraphyses linear. 



Dermatea umbrina, Cke. & Mass., Grev., vol. xxi. p. 72. 



On dead branches of TJlex. 



Described from type. 



Cenangium leoninum. Cke. & Mass., Grev., vol. 

 xxi. p. 72. 



Caespitose, stipitate, at first turbinate and closed, then 

 expanding, the pale, chestnut-brown disc becoming almost 

 or quite plane, with a distinct upraised margin, which is 

 strongly incurved when dry, up to 4 mm. across, external 

 surface golden-yellow to tawny-orange, radiately rugulose 

 and minutely velvety ; excipulum composed of slender, 

 hyaline hyphae much interwoven, and ending at the surface 

 in inflated, hyaline, 1-2-septate hairs, 15-20 X 4-5 /x, these 

 form the velvety surface ; stem 10-15 mm. long, stout at the 

 base, yellow and velvety, often branched, each branch 

 ending in an ascophore ; asci cylindrical, stipitate, 8-spored ; 

 spores elliptical, 2-guttulate, hyaline, continuous, 9-10 x^i 

 paraphyses filiform. 



On hard decorticated wood. 



Described from type specimen. 



