EYPAROBIUS. 181 



their length above the level of the disc at maturity. The 

 spores are surrounded by a layer of mucus when young. 



Ryparobius tenacellus. Phil., Grew, xix. p, 74 ; 

 Sacc, Syll., Suppl., vol. x. n. 4592. 



Scattered ; at first cylindrical, then hemispherical, im- 

 marginate, entirely white, about J mm. across, excipulum 

 parenchymatous, external cells about 10 jx diameter ; disc 

 plane or slightly convex ; asci broadly cylindric-clavate, 

 32-sporecl, dehiscing by a distinct annular apical lid ; spores 

 smooth, continuous, elliptical, hyaline, 10-12 X 7-8 fx ; 

 paraphyses rather stout, septate, 5-6 /a thick at the clavate 

 tip, hyaline. 



On rabbit dung. 



This species approaches Ryparobius albidus, Boud., but 

 has larger asci and spores, and is quite white. 



Ryparobius parvisporus. Phil., Brit. Disc, p. 303 ; 

 Sacc, Syll., viii. n. 2250. 



Very minute, fragile, somewhat more fleshy than other 

 species, white and brilliant at first, then duller, with a 

 faintly vinous tinge ; substance formed of bladdery polygonal 

 cells, unequal in size, and often projecting in hair-like 

 threads ; margin unevenly fringed with somewhat roughened 

 subulate hairs, often in a partly double row ; disc at first 

 flat, then filled with the prominent, broadly clavate asci ; 

 spores 16-24, elliptic, hyaline, smooth; paraphyses filiform, 

 stout, septate. 



Ascozonus parvisporus, Penny, Trans. Woolhope Club, 1873, 

 p. 131, pi. 3, figs. 1-5 ; Journ. Bot. 1874, p. 356, t. 156, 

 tigs. 1-5. 



On rabbit dung. Autumn. 



Unknown to me. 



Ryparobius Crouani. Phil., Brit. Disc, p. 300 ; 

 Sacc, Syll., viii. n. 2246. 



Very minute, at first clear white, then whitish, fragile, 

 sessile, hemispherical, glabrous, cortex formed of a single 

 series of cells ; margin ciliated with a single series of rough, 

 subacuminate hairs ; asci broadly clavate ; spores 32, oblong- 

 fusiform, obtuse at the ends, hyaline, smooth ; paraphyses 

 not seen. 



