OF GREAT BRITAIN. 327 



minute, superficial, scattered, black, plane, margin entire, slightly 

 elevated ; hypothecium nigro-fuscous, thickish ; lateral excipulum 

 bluish-black ; paraphyses distinct, apices nigricant ; spores 8, 

 colourless, lineari-oblong, 1 -septate, small. 



On rocks, tiles, flints, &c, not uncommon. 1881. 



Stn :— Borr. in E. Bot. Suppl. 2687. Nyl. Prodr. 136. Mudd Man. 180. 



Tig :— E. Bot. Suppl. 2687 f. 2. Hepp Sporen t. 4. f. 13. & t. 58. f. 498. 



Exs :— Nyl. 139. Hepp 13. 498. Anzi Langob. 448. 



Geog. Distrib :— Europe. 



Bot. Prov :— 1, 2...5, 6, 7...10...19...26...31. 



England ; — Sussex ! Mr. Borrer. (1831.) Ayton ! Cleveland ; near Rievaulx, 

 Bilsdale, Yorkshire. Mr. Mudd. near Brighton jLaneast Down, Cornwall. Dr. 

 Hall. Wrekin ! Pontesford Hill ! Haughmond Hill ! Shropshire. 



Scotland :— Ben Lawers and Crate Guie. Rev. J. M. CromJbie. 



Ireland :— Dunkerron ! Dr. Taylor. Whitepoint ! near Cork ; Blackwater ; 

 Blaekstone Bridge ; Mr. Carroll. Kylemore ! Dawros Bridge ! Glencorbot ; 

 Lettermore, oo. Galway. Mr. Larbalestier. 



Wales : — Abergwynant ! Dolgelley. Dr. Holl. Trefriw falls ! 



Channel Islands :— Bonne Nuit ; Rozel Valley ! Jersey. Mr. Larbalestier. 



" Spennogonia minute, punctiform, semi-immersed. Sperm atia ellipsoid, 

 short .0005 in. long, by .0001 in. broad. Spores .002 to. 0025 in. long, by .0005 

 to .00075 in. broad." (Mudd.) " Spores .007— .010 mm. long, .0025— .003 mm. 

 broad." (Nyl.) Spores .007— .012 mm. long, .0025— .0035 mm. broad. 



forma ecrustacea, Leight. thallus evanescent and obliterated. 



Wales :-Goodwick Bay ! Pembrokeshire. (1876). 



227. L. umbrinella, Nyl. umbrine-brown, thin, subrugulose, 

 rimulose : apothecia black, somewhat prominent, plane, submargined, 

 whitish within ; epithecium and hypothecium brown ; spores 8, 

 colourless, fusiform, simple or 1-septate ; paraphyses with brown 

 clavate apices ; gelatina hymenea I bluish then vinous-reddish. 



On micaceous rocks, rare. 1876. 



Stn :— Nyl. in Flora 1876. p. 309. 

 Bot. Prov :— 26. 



Ireland : — Dawros river, Connemara. Mr. Larbalestier. (1876). 

 " Spores .003— .014 mm. long, .002 — 3 mm, broad. Nearest to L. prominula 

 Borr. but with thinner thallus and different reaction with iodine." (Nyl.) 



228. L. applanata, (Fr.) griseo-pallescent, thin, disperso- 

 areolate, areolae plano-convex, depressed, (K brownish C 

 brownish) ; hypothallus nigricant predominating ; apothecia black, 

 plane, innato-sessile, margin thick ; hypothecium black ; 

 paraphyses conglutinate, apices clavate, fusco-nigricant ; spores 8, 

 colourless, oblong, 1-septate. 



On quartzose and schistose rocks, not common. 1856. 



Syn : — Er. S. V. Sc. p. 116. (1846). L. atroalba var. chloroapora, Nyl. Lich. 

 Holm. 1. in Bot. Notis. 1853. p. 6. Seand. 233. L. eolludens, Nyl. in Flora 1870, 

 p. 38. Leight. L. El. 2d ed. 314. 



Exs :— H'r. L. Su. 382 C. (fide T. M. Fries. L. Soand. 618). Arn. 232. 



Geog. Distrlb : — Scandinavia. 



Bot. Pbov:— 6, 7.. .15.. .26. 



Scotland : — Killin ! Breadalbane. Rev. J. M. Crombie. Ben Lawers ! Dr. 

 Stirton. 



Wales :— Barmouth ! Cwm Glas ! Snowdon; Llyn-y-Cae ! Cader Idris ; Pen 

 Cow ! near Fishguard, Pembrokeshire ; Towyn ! Holyhead ! 



Ireland : — Kylemore ! Salrock Road ! co. Galway. Mr. Larbalestier. 



" Spores .018—27 mm. long. .009— .014 mm. broad." (Nyl.) " Spores .016 

 — 29 mm. long, .006—13 mm. broad." (T. M. Fr.) Gelatina hymenea I dark- 

 blue, Spores .026 mm. long, .011 mm, broad, colourless, sometimes fuscescent. 



