100 LECANO-LECIDEEI [lECIDEA 



185. L. expansa NyJ. ex Mudd Man. p. 208 (1861).— Thallus 

 effuse, thin, furfuraccous, continuous or riniulose, black or sordid- 

 greyish (K — , CaCl — ). Apothecia minute, sessile, plane, mar- 

 gined, black, the margin thin, smooth ; hypothocium dark-brown; 

 paraphyses concrete, blackish-brown at the apices ; spores ellip- 

 soid, minute, 0,007-10 mm. long, 0,0035-40 mm. thick ; hy menial 

 gelatine bluish with iodine. — L. dispansa Nyl. in Flora xlix. 

 p. 87 (1866) ; Cromb. Lich. Brit. p. 84 ; Leight. Lich. Fl. p. 256 ; 

 ed. 3, p. 248. 



Exsicc. Leight. n. 186 ; Mudd n. 176 ; Larb. Lich. Hb. n. 222. 



The thallus when black and little developed forms ink-like stains 

 on the substratum. The apothecia, though very numerous, are 

 scattered and solitary. The very minute spermogones are frequent, 

 with cylindrical or subellipsoid spermatia, 0,003-4 mm. long, 

 0,0015 mm. thick. 



Hob. On rocks and flint stones in maritime and upland situations. 

 — Distr. Only here and there in England and Wales, Ireland and the 

 Channel Islands ; not seen from Scotland.— 5. M. Rozel, Jersey ; 

 Lydd Beach, Kent ; Thetford, Norfolk ; Bewdley, "Worcestershire ; 

 Stiperstones, Shropshire ; near Battersby and Roseberry, Cleveland, 

 Yorkshire ; Teesdale, Durham ; Glencorbot, Connemara, Galway. 



Subsp. demarginata Nyl. in Flora Ixi. p. 245 (1878). — 

 Thallus very thin, subleprose, whitish or greyish. Apothecia 

 convex, the margin indistinct, otherwise as in the species. — 

 Cromb. in Grevillea vii. p. 97 ; Leight. Lich. Fl. ed. 3, p. 248. 



In the single specimen seen, which is well fertile, the thallus is 

 partly subochraceous. 



Hah. On schistose rocks in a maritime district. — B. M. Salrock 

 Eoad, near Kylemore, Connemara, Galway (the only locality). 



186. L. antiloga Stirton in Scott. Nat. iv. p. 164 (1877).— 

 Thallus nearly evanescent. Apothecia black, minute, adnate, 

 plane, margin somewhat shining ; hypothecium colourless, darker 

 upwards ; paraphyses very indistinct, the epithecium blackish or 

 greenish-black ; spores spherical, minute, 0,004-55 mm. broad ; 

 hy menial gelatine blue then dark violet. — Leight. Lich. Fl. ed. 3, 

 p. 309. Specimen not seen. 



Hah. On decorticated wood. Collected by Dr. Stirton at Aviemore, 

 Elgin. 



187. L. enclitica Nyl. in Flora xlix. p. 369 (1866) & in Not. 

 Sallsk. Faun. & Fl. Fenn. n. ser. v. p. 148 (1866).— Thallus scarcely 

 visible, evanescent or obsolete Apothecia minute, convex, 

 immarginate, black, dark within ; hypothecium brown : para- 

 physes concrete ; epithecium vaguely blackish ; spores oblong, 

 0,008-14 mm, long, 0,003-4 mm. thick; hymenial gelatine bluish 

 then sordid-wine-coloured with iodine. — Cromb. in Grevillea i. 

 p. 172; Leight. Lich. Fl. p. 301 ; ed. 3, p. 311. 



