SCLERODERRIS. 125 



thin and coriaceous, §— 1^ mm. across; cortex composed of 

 parallel, septate, dark brown hyphae radiating from base to 

 margin; asci cylindric-clavate, narrow, rounded above, 8- 

 s pored ; spores arranged in a parallel fascicle, hyaline, linear- 

 fusiform, both ends pointed, straight or slightly curved, 

 becoming 5-7-septate, 60-70x2*5-3*5 /x ; paraphyses 

 slender, hyaline, sometimes branched, tip not thickened. 



Cenangium fuliginosum, Fries, Elench. Fung., ii. p. 23 ; 

 Phil., Brit. Disc, p. 348. 



Pycnidia. Accompanying the ascophores, globose, smooth, 

 blackish, opening by a pore at the summit; stylospores 

 narrowly fusiform or falciform, li3'aline, straight or curved, 

 3-septate, 20-30 x 2*5 /x. 



Pilidium carbonaceum, B. & Br., Ann. Nat. Hist., n. 442. 



On willow branches. 



Specimen in Mong. & Nest., Stirp. Crypt., n. 889, 

 examined. 



Scleroderris majuscula. Cke. & Mass., Grev., vol. xxi. 

 p. 73. 



Erumpent then superficial, stipitate, large, scattered, 

 tough, turbinate and closed, then expanding and becoming 

 almost plane, margin slightly incurved, becoming strongly 

 contracted and rigid when dry, 5—7 mm. across ; disc dark 

 purple-brown, externally clove-brown, glabrous but wrinkled 

 when dry; stem about 2 mm. long, slender, expanding 

 upwards into the ascophore; asci cylindrical, 8-spored; 

 spores elliptical, ends narrowed, hyaline, 3-septate, 15 x 7 /x; 

 paraphyses filiform. 



On oak bark. 



Described from type. 



Scleroderris pseudoplatani. Mass. 



Caespitose, erumpent, sessile or substipitate ; disc at first 

 convex then a little depressed, hoary-white, becoming at 

 times pale yellowish brown ; asci broadly clavate ; spores 8, 

 biseriate, oblong or oblong-elliptic, with 3 guttulae, at 

 length 3-septate, 15-17 X 5-7 /x; paraphyses clavate at the 

 summits. 



Dermatea pseudoplatani, Phil., Grev., vol. xvii. p. 45 ; Sacc, 

 Syll., viii. n. 2274. 



