182 LECANO-LKCIDKKI [bUELLIA 



England, Wales, on the Gmmpians, Scotland, and in W. Ireland. — 

 B. M. ]k*adgate Park, Leicestcisliire ; near Buxton, Derbyshire ; 

 Dolgelly and Cader Idris, Merioneth ; near Douglas, Isle of Man ; 

 Eskdale, Cumberland; Den Lawers and Craig Calliarch, Perthshire ; 

 Morrone, Draemar, Aberdeenshire ; Glen Nevis, Invernessshire ; 

 near Ivylemore, Conneniara, Galway. 



33. B. deludens A. L. Sm. — Thallus determinate thin, firm, 

 cracked, whitish (Kf -f- yellowish, C'aCl — ) ; hypothallus thin, 

 black. Apothecia rather large, plane; innate and circumcissed, 

 obtusely margined, black ; hypothecium brown ; paraphyses sub- 

 discrete, regular, brown or violet-brown at the clavate apices, 

 the epithecium blackish (K -f purplish) ; spores ellipsoid, dark- 

 brown, with a hyaline epispore, 0,022-27 mm. long, 0,008-13 mm. 

 thick ; hymenial gelatine deep-blue with iodine. — Lecidea de- 

 ludens Nyl. in Flora M. p. 296 (1873); Cromb. in Grevillea ii. 

 p. 90 ; Leight. Lich. Fl. ed. 3, p. 323. 



The apothecia usually scattered, are occasionally 2-3 -confluent, 

 the margin then being obliterated. 



Hab. On quartzose stones in an alpine situation. — B. M. Summit 

 of Cairn Gowar, Blair Athole, Perthshire (the only locality). 



34. B. confervoides Krempelh. Lich.-Fl. Bay. p. 200 (1861). 

 —Thallus effuse, greyish- or brownish-white, thin, tartareous, 

 areolate, the areolae small, contiguous or scattered, plane or 

 slightly convex, hypothallus blackish, usually indistinct. Apo- 

 thecia small, black, innate sessile, plane, indistinctly marginate ; 

 hypothecium blackish-brown ; paraphyses slender, conglutinate, 

 slightly clavate, and blackish-brown at the apices ; spores ellip- 

 soid, at first colourless, becoming brown, with a hyaline epispore, 

 0,021-30 mm. long, 0,008-14 ram. thick. — Lecidea atroalhicans 

 Nyl. in Flora Iviii. p. 363 (1875) ; Leight. Lich. FL ed. 3, p. 328. 



Distinguished by the smooth thallus and the innate flat apothecia. 



Hab, On rocks. — Distr. Eare in W. Scotland and W. Ireland. — 

 B. M. Barcaldine, Argyll ; Cloghan, Connemara, Galway. 



35. B. hadioatra Koerb. Syst. Lich. Germ. p. 223 (1855).— 

 Thallus determinate, thickish, areolate or cracked-areolate, the 

 areola? plane, brownish or dark-brow'n (K — , CaCl — , K, CaCl + 

 tawny-yellow, medulla I — ) ; hypothallus blackish. Apothecia, 

 innate, plane, thinly margined, black ; hypothecium dark-brown ; 

 paraphyses coherent or lax, purplish or reddish-brown at the 

 slightly clavate apices ; epithecium blackish (K -f- purplish violet) ; 

 spores ellipsoid or oblong-ellipsoid, often slightly constricted in 

 the middle, brown or at length blackish-brown, with a thin 

 hyaline epispore, 0,026-36 mm. long, 0,012-18 mm. thick; 

 hymenial gelatine deep-blue with iodine. — Mudd Man. p. 214, 

 t. 4, f. 81, pro parte. Lecidea hadioatra Floerke ex Spreng. 



