346 PYKENOCARPEI [tHELOCABPON 



colourless, oblong, obsoletely guttulate at each end, 0,0025-40 

 mm. long, 0,0015-20 mm. thick; hymenial gelatine scarcely 

 tinged, the asci pale-bluisb, with iodine. — Leight. in Ann. Mag. 

 Nat. Hist. ser. 3, xiv. p. 401, t. 9, ff. 1-5 (1864) & Lich. M. 

 p. 407 ; ed. 3, p. 439 ; Cromb. Lich. Brit. p. 106. Sphseropsis 

 Laureri Flot. in Bot. Zeit. v. p. 65 (1847). 



Exsicc. Leight. n. 351 ; Larb. Lich. Hb. n. 357. 



Hah. On old rails and on burnt ground. — Distr. Eare and scarce 

 in Central England. — B. M. Middletown and ArkoU Hill, Shropshire. 



2. Th. Intermediellum Xyl. in Flora xlviii. p. 261 (1865). — 

 Thallus forming small rerrucse, yellowish-green. Perithecia 

 minute, globose, enclosed in the verrucse, depressed at the ostiole ; 

 paraphyses absent ; asci broad towards the middle, tapering 

 upwards ; spores minute, oblong, guttvdate at each end, 0,0035-50 

 mm. long, 0,002 mm. thick ; hymenial gelatine tawny-wine-red, 

 the asci faintly bluish, with iodine. — Phillips in Grevillea ii. 

 p. 125, t. 21 ; Leight. Lich. PI. ed. 3, p. 439. 



Distinguished from the preceding species by the somewhat large 

 size of the perithecia and the absence of paraphyses. I have given 

 the size of the spores as recorded by Phillips, but in the specimens 

 examined they are constantly smaller, measuring about 0,002 '3 nun. 

 long, 0,0015 "20 mm. thick. Nylander calls attention to the peri- 

 physes, fasciculate filaments which occur near the ostiole and replace 

 the paraphyses. 



Hab. On rotten wood and old leather. — B. M. Near Shrewsbm-y, 

 Shropshire. 



3. Th. superellum Nyl. in Flora xlviii. p. 261 (1865).— 

 Thallus in scattered verrucse, greenish-yellow. Perithecia small, 

 globose, the ostiole subcorneal ; paraphyses very abundant, 

 straight, slender and thread-like ; asci tapering upwards ; spores 

 ellipsoid, 0,009-12 mm. long, 0,0040-45 mm. thick ; hymenial 

 gelatine not tinged, the asci bright-blue, with iodine. — Leight. in 

 Grevillea iii. p. 116 ife Lich. Fl. ed. 3, p. 440; Cromb. in Journ. 

 Bot. xiii. p. 142 (1875). 



Externally not unlike the two preceding species though the 

 perithecia are slightly larger and not depressed above. The 

 paraphyses are markedly dissimilar, and the spores larger. 



Hab. On earth and decaying hepatics, rare. — B. M. Trefriw, 

 Carnarvon. 



4. Th. epithallinum Leight. in Ann. Mag. Nat. Hist. ser. 3, 

 x:viii. p. 24 (1866) ; Nyl. in Flora xlix. p. 420 (1866).— ThaUus 

 in scattered verrucse, yellowish-green. Perithecia globose, minute ; 

 paraphyses stouter than in the preceding species, rather short 

 and unbranched ; asci elongate, linear-cylindrical ; spores oblong 

 or cylindrical-oblong, 0,006-7 mm. long, 0,0020-25 mm. thick ; 



