BIATORINA] LECIDEACEiE 115 



then more or less confused with the substratum. In the British 

 specimens the apothecia arc minute and rather scattered. 



Hah. On shaded calcareous rocks in mountainous tracts. — Distr. 

 Only in N.W. Ireland and the S.W. Highlands, Scotland. — B. M. 

 Achosragan Hill, Appin, Argyll ; Twelve Pins, Connemara, Galway. 



Var. luteella A. L. Sm. — Thallus thin, often in white 

 patches. Apothecia colourless within, the asci usually thick 

 and solid at the apices ; spores oblong or oblong-fusiform, 

 0,016-23 mm. long, 0,006-7 mm. thick. — Lecidea luteella Nyl. 

 in Flora xlviii. p. 6 (1865) ; Leight. in Ann. Mag. Nat. Hist. 

 ser. 3, xvii. p. 62 ; Cromb. Lich. Brit. p. 73 ; Leight. Lich. Fl. 

 p. 322 ; ed. 3, p. 339. Specimen not seen. 



Differs from the type in the colourless hypothecium and epithecium 

 and in the slightly larger spores. 



Hah. On calcareous rocks in upland districts. — Distr. S. England 

 (Eastbourne, Sussex) and N.E. Ireland (Sheepwalk, Armagh). 



Subsp. delutula A. L. Sm. — Thallus very thin, at length 

 rimose, greyish-green. Apothecia minute, usually gyalectoid, pale- 

 yellowish-flesh-coloured ; spores 0,012-16 mm. long, 0,004-5 mm. 

 thick. — Lecidea delutula Nyl. in Flora Ixii. p. 223 (1879) ; 

 Cromb. in Grevillea viii. p. 30. 



Characterized chiefly by the differently coloured thallus, and the 

 paler, smaller apothecia. In the two specimens seen, which are well 

 fertile, the thallus is scattered and only here and there visible. 



Hah. On moist siliceous ferruginous rocks in a mountainous 

 district. — jB. M. Lough Feagh, Connemara, Galway (the only locality). 



9. B. bseomma A. L. Sm. — Thallus indeterminate, thin, 

 opaque, unequal, faintly cracked, glaucous or yellowish-white 

 (K 4- yellow, CaCl — ). Apothecia moderate, plane, subangulose- 

 diffbrm, pale-reddish, livid or livid-brow^n, with a white, thickish, 

 epithalline margin ; paraphyses somewhat slender ; epithecium 

 yellowish-granulose ; spores oblong, 0,010-18 mm. long, 0004-6 mm. 

 thick ; hymenial gelatine bluish then tawny -wine-red with iodine. 

 — Lecanora heeomma Nyl. in Flora lix. p. 233 (1876). Lecidea 

 hseomma Nyl. in Flora Ix. p. 459 (1877) ; Leight. Lich. Fi. ed. 3, 

 p. 221. L. rujpicola Nyl. /. c. pp. 228, 562 ; Cromb. in Grevillea 

 vi. p. 19 ; Leight. Lich. Fl. ed. 3, p. 337. 



Exsicc. Larb. Lich. Hb. n. 26. 



Hah. On mica-schist rocks near the sea. — B. M. Letterfrack, 

 Connemara, Galway (the only locality). 



Var. glaucocarnea A. L. Sm. — Thallus determinate, rugulose 

 or subleprose, cracked-areolate, glaucous-green. Apothecia pale- 

 flesh-coloured or livid, sometimes slightly pruinose, the margin 

 somewhat paler, at length evanescent. — Lecidea glaucocarnea 

 Nyl. in Flora Ix. p. 459 (1877). X. csesiolepra Nyl. in Flora 

 Ixiv. p. 532 (1881); Cromb. in Journ. Bot. xx. p. 275 (1882). 



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