CKYPTODISCUS. 87 



Stictis pallida, Pers., Obs., ii. p. 74, t. 6, f . 7 ; Phil., Biit. 

 Disc, p. 383. 



On decorticated wood. 



Specimen examined in Fries' Scler. Suec, n. 275. 



Disc most frequently elliptic-oblong, whitish or tinged 

 with red or ochraceous, proper margin almost obsolete, but 

 bounded by the slightly raised wood of the matrix, which 

 is whitish just surrounding the disc. 



Cryptodiscus microstomus. Sacc, Syll., viii. n. 2758. 

 (figs. 13, 14, p. 91.) 



Sparsely scattered, minute, immersed then becoming rather 

 prominent; margin dark brown, disc circular or broadly 

 elliptical, ochraceous ; about \ mm. across ; asci clavate, 

 8-spored; spores irregularly biseriate, narrowly cylindric- 

 fusiform, smooth, hyaline, 3-septate, 14-16 X 3 /x ; para- 

 physes filiform, hyaline, apex not thickened, sometimes 

 slightly branched. 



Stictis microstoma, Carm., in Engl. Fl., vol. v. p. 213 ; 

 Phil., Brit. Disc, p. 383. 



On wood. 



Type specimen examined. 



Scattered, at first nearly white, with a minute orifice, 

 round which it gradually assumes a darker hue, and at 

 length, under a high magnifier, appears, when moist, of a 

 subolivaceous black, resembling a minute Sphaeria. (Berk.) 



Cryptodiscus angulosus. Karst., Kev., p. 166; Sacc, 

 Syll., viii. n. 2757. 



Gregarious, immersed in the parenchyma of the bark, at 

 first covered then seated upon the epidermis ; disc angular or 

 rarely nearly circular, thin, at first with a bluish tinge, then 

 dingy greenish-grey, pruinose, usually surrounded by about 

 4 obtusely triangular teeth, up to 1 mm. across ; asci elon- 

 gato-clavate, 8-spored; spores 2-seriate, elongated, slightly 

 curved, hyaline with a tinge of yellowish-green, 3-septate, 

 16-23 x 3-4 /jl; paraphyses not very distinct. 



Propolis angulosa, Karsten, Myc. Fenn., i. p. 244 ; Phil., 

 Brit. Disc, p. 378. 



On willow branches (Salix capraea). 



