58 LBCANO-LECIDBEI [lBCIDBA. 



granules large, scattered or aggregate, convex, composed of 

 minute conglomerate convex roundish or sublobate subfur- 

 furaceous squamules (K + pale-yellow, CaCl + pale yellow). 

 Apothecia violet-black, rather large, innate-sessile, at first plane 

 with a thickish margin, then convex and immarginate, slightly 

 pruinose ; hypothecium very thick, brownish-black, with a paler 

 brown stratum below ; paraphyses coherent, brown at the 

 apices; spores elongate-cylindrical, small, 0,011-12 mm. long, 

 0,0045-50 mm. thick. 



Hah. On stone walls in upland districts. — B. M. Moel-y-gest 

 near Tremadoo (the only locality). 



92. L. asnea Dufour ex Fr. Lich. Europ. p. 108 (1831); 

 Nyl. in Act. Soc. Linn. Bord. ser. 3, i. p. 380. — Thallus sub^ 

 determinate, thickish, rimulose- or verruoose-areolate, shiningj 

 tawny or dusky- brown, the areolae plane or convex (EJf -l-yellowish, 

 CaCl — , medulla I — ) ; hypothallus black. Apothecia moderate 

 or somewhat large, adnate, at first plane and thinly margined, 

 at length convex and immarginate, brownish-black or black, 

 whitish within ; paraphyses concrete, somewhat fnliginpus at 

 the apices ; hypothecium colourless ; spores oblong-elhpsoid, 

 0,015-18 mm. long, 0,005-7 mm. thick ; hymenial gelatine 

 bluish then sordid with iodine. — Cromb. in Journ. Bot. xi. p. 135 

 (1873) ; Leight. Lich. Fl. ed. 3, p. 297. 



Might be taken, at first sight, for a variety of Lecanora badia, as 

 it was regarded by Schserer {vide Enum. p. 68). The apothecia in a 

 young state look somewhat leoanoroid ; in the British specimens they 

 are numerous, at times somewhat crowded and then angulose. The 

 spermogones, not visible in these, are (fide Th. Fries. Lioh. Scand. 

 p. 457), long, aoioular and arcuate. 



Hob. On a mica-schist boulder in a mountainous region. — B. M. 

 Morrone, Braemar, Aberdeenshire (the only locality). 



93. L. cyelisca Malbr. in Bull. Soc. Sci. Nat. Kouen xvii. 

 p. 131 (1881). — Thallus thick, cartilaginous, subdeterminate 

 unequal, glaucous - cinereous - white, f urf uraceous. Apothecia 

 minute, blackish-brown, irregularly grouped in small circles, 

 plane, immarginate, reddish when moistened, and then somewhat 

 swollen and convex ; hypothecium colourless ; paraphyses 

 indistinct, reddish-brown at the apices; spores ellipsoid-oblong, 

 with a thick epispore, rather large, 0,016-18 mm. long, 

 0,009-10 mm. thick. — Biatora cyelisca Massal. Sym. Lich. p. 40 

 (1855). 



Very distinctive on account of the soft thick uneven thallus, 

 which becomes pitted after the disappearance of the apothecia. The 

 single specimen in the British Museum is well fertile. 



HaA. On limestone. — B. M. Bathampton Downs, Wiltshire, 



94. L. nigroglomerata Leight. Lich. Fl. p. 252 (1871). — 

 Thallus effuse, subareolate, minutely squamulose, the squamules 



