LECIDEa] LECIDEACEiE 43 



(K — , CaCl — ). Apothecia small, convex, immarginate, black, 

 concolorous within ; hypothecium thick, brown ; epithecium 

 dark-greenish; spores ellipsoid, small, 0,006-10 mm. long, 

 0,0035 mm. thick ; hymenial gelatine bluish then tawny-wine- 

 coloured with iodine. — Cromb. in Grevillea v. p. 26 ; Leight. 

 Lich. Fl. ed. 3, p. 268. 



Near the preceding, but differing, among other characters, in the 

 more developed thallus, the darker epithecium, and the nature of the 

 habitat. It is usually more or less overrun by young states of 

 Sirosiplion saxicola. The apothecia are often 2- or several- connate. 



Hah. On dry arenaceous rocks in a maritime district. — B. M. 

 Near Westport, Connemara, Gal way (the only locality). 



56. L. misella Nyl. in Not. Sallsk. Faun. & Fl. Fenn. n. 

 ser. V. p. 177 (1866). — Thallus effuse, thin, minutely granulose- 

 unequal, yellowish-green, at times subevanescent. Apothecia 

 subminute, subinnate-sessile, convex, immarginate, brownish or 

 brownish-black, pale violet-black within ; epithecium and hypo- 

 thecium subiacolorous ; spores ellipsoid or oblong-ellipsoid, minute, 

 0,007-9 mm. long, 0,0030-35 mm. thick; hymenial gelatine 

 bluish then wine-red with iodine. — Cromb. in Grevillea i. p. 

 172 ; Leight, Lich. Fl. ed. 3, p. 265. L. anomala var. misella 

 Nyl. Lich. Scand. p. 202 (1861). L. melanochroza Leight. ex 

 Cromb. in Journ. Bot. ix. p. 178 (1871) & Lich. Fl. p. 267. 



Exsicc. Cromb. n. 174. 



Eesembles a small state of L. horgidula, but differs in the colour 

 of the often subfurfuraceous thallus, in the smaller spores and other 

 analytical characters of the apothecia. These are numerous, occa- 

 sionally somewhat crowded and at length globose. Elsewhere the 

 plant is known only from Scandinavia and Finland. 



Hab. On an old fir paling in a mountainous region. — B. M. Near 

 Loch Tummel, Perthshire (the only locality). 



57. L. paucula Nyl. in Flora lix. p. 573 (1876).— Thallus 

 effuse, very thin, smooth, continuous, greenish or greyish-white 

 (K — , CaCl — ). Apothecia minute, convex, immarginate, livid- 

 brown within, brown under the hymenium ; paraphyses colourless 

 at the apices ; hypothecium thick, brownish-black ; spores 

 ellipsoid, 0,006-7 mm. long, about 0,003 mm. thick ; hymenial 

 gelatine tawny-wine-coloured with iodine. — Cromb. in Grevillea 

 V. p. 106 ; Leight. Lich. Fl. ed. 3, p. 249. 



Exsicc. Larb. Lich. Hb. n. 223. 



Near L. hotryoides Nyl., of Finland. The two specimens seen are 

 well fertile, the apothecia not being very black as stated by Leighton. 



Hah. On schistose rocks in streams in mountainous districts. — 

 Distr. Found only in N.W. Ireland. — B. M. Near Kylemore and 

 Twelve Pins, Connemara, Galway. 



58. L. mutabilis Fee Ess. Crypt, ii. p. 105 (1837).— Thallus 

 thin, membranaceous, smooth, whitish often limited by a narrow 



