lecidea] lecideace^ 17 



black hypotliallus. Apothecia scattered, black, small with a thick, 

 tumid margin ; spores uniseriate in the ascus, with a very thick 

 border, almost cuboid at first from compression, larger than in 

 the type, about 0,012 mm. in diameter. 



The three specimens collected by Crombie are all from one locality. 

 One of them Nylander had recognized as distinct from, though closely 

 allied to, L. lugubris, and had given it a specific name which we have 

 adopted for the variety. 



Hab. On the schistose stones of an old wall. — B. M. Glen Fender, 

 Blair Athole, Perthshire. 



12. L. confertula Stirton in Trans. Glasgow Soc. Nat. p. 86 

 (1875). — Thallus pallid-cinereous, crustaceous, squamulose, the 

 squamules small, contiguous or dispersed (K — , CaCl — ). Apothecia 

 dark-brown, minute, numerous, nearly plane with an obtuse 

 margin, often contiguous ; hypothecium colourless ; paraphyses 

 almost coherent, clavate and brown at the apices, spores ellipsoid, 

 0,010-13 mm. long; hymenial gelatine blue then reddish- violet 

 with iodine especially the asci. — Leight. Lich. Fl. ed. 3, p. 243. 

 Specimen not seen. 



Hab. On rocks. Collected by Dr. Stirton near Killiecrankie, 

 Perthshire . 



13. L. endocyanea Stirton in Scott. Nat. iv. p, 165 (1877). — 

 Thallus blackish, squamulose-diffract, the squamules plane or 

 somewhat convex, appressed (K — , CaCl — ). Apothecia brownish- 

 black, sessile, small, at first urceolate, then plane or convex and 

 immarginate, internally nearly all, but especially upwards of a 

 violet colour ; hypothecium brownish or nearly colourless ; 

 paraphyses distinct, slender, closely intertwined at the apices ; 

 spores ellipsoid or oblong-ellipsoid, 0,011-14 mm. long, 0,006-7 

 mm. thick ; hymenial gelatine blue then yellowish with iodine. — 

 Leight. I. c. Specimen not seen. 



Hab. On rocks. Collected by Dr. Stirton in Island of Mull. 



14. L. sporeta Stirton /. c. p. 166. — Thallus whitish squamu- 

 lose, the squamules dispersed, plane or somewhat convex and 

 sometimes crenulate (K — , CaCl — ). Apothecia small, brownish- 

 black, crowded, adnate, plane, obtusely margined, somewhat 

 shining, hypothecium colourless ; paraphyses not well discrete, 

 brown at the apices; spores ellipsoid, 0,011-15 mm. long, 

 0,005-6 mm. thick ; hymenial gelatine blue then brownish with 

 iodine. — Leight. /. c. p. 244. Specimen not seen. 



Hab. On rocks. Collected by Dr. Stirton in Island of Mull. 



15. L. pissodes Stirton /. c. — Thallus dark brownish-black, 

 squamulose, diffract, the squamules small, somewhat concave or 

 plane (K — , CaCl — ). Apothecia black, small, crowded, innate, 

 plane, slightly margined; hypothecium colourless; paraphyses 



II. c 



