. OF QBEAT BRITAIN. 311 



Stn:— Ehrh. Cr. Exs. 244. (1793.) Nyl. Prodr. 135. L. immersa, (Schrad.) 

 Aoh. Meth. 34. 



Fig :— E. Bot. 193. Leight. Aug. Lich. t. 24. f . 5. Mudd Man. 203. 



Exs :— Nyl. 138. Schaer. 201. Anzi It. S. 266. 267. Leight. 94. Am. 360. b. 



' Geog. Distkib : —France, Switzerland, Europe. 



Bot. Pbov :-1...3...6, 7, 8. .10, 11.. .(19— 30). 



England :— Derbyshire. Sir J. E. Smith. (1794.) Ingleborough. Br. Carring- 

 ton. near Thirsk. Mr, Baker, near Mashara, Yorkshire. Mr. Mudd. Durham 

 and Northumberland. Mr. Winch. Ingsdon ; Chudleigh ; Bickington ; Ash- 

 burton; Babbioombe, Devon. Messrs. Jones & Kingston. Charlton, Kent. Mr. 

 Holmes. Craig-y-Rhiw ! near Oswestry ; Llanymyneoh Hill ! Shropshire. 



Ireland : — Not uncommon. Mr. Carroll. 



Wales:— Eglwyseg rocks! near Llangollen ; Great Orme's Head ! Tenby! 



Externally and generally similar to, but not to be confounded with Verru- 

 caria immersa, Leight. Ang. Lich. t. 25. f. 2. " Spores .003 — .00325 in. long, 

 by .001—00125 in. broad." (Mudd.) "Spores .013—18 mm. long, .008—9 

 mm. broad." (Nyl.) "Spores .010—15 mm. long, .007 — 8 mm. broad." 

 (T. M. Fries.) Spores .011— .012 mm. long, .007 mm. broad. The apothecia, 

 when wetted, remain of a black colour by reason of the dark hypotheoium and 

 so prevents its confusion with Lecidea Metzleri, (Korb.) and Lecanora Agard- 

 hanoides, Mass. in which the disk of the apothecia, when wetted, becomes of a 

 translucent chestnut-brown by reason of the pale hypothecium. 



185. L. Metzleri, (Korb.) greyish-white, thin, effuse, evanes- 

 cent ; apothecia black, innato-adnate, plane, slightly margined, at 

 length convex, immarginate ; epithecium when wetted translucent 

 chestnut-brown, the margin darker-brown ; hypothecium colourless; 

 spores 8, colourless, broadly oblong, simple, large ; paraphyses 

 distinct, conglutinate, apices fuscous ; gelatina hymenea I blue 

 then fulvescent, thecse reddish. 



On calcareous rocks, rare. 1872. 



Stn :— Korber Par. 162. (1865.) T. M. Fr. Scand. 478. 

 Exs : — Am. 351. 



Geog. Distbib : — Germany, Sweden, Norway. 

 Bot. Pbov :— 6. 



Wales :— Giltar Point ! Tenbv. (1872.) 



"Spores .016— 26 mm. long, .006—10 mm. broad." (T. M. Fries.) Spores 

 .02 mm. long, .0115 mm. broad. 



186. L. enclitica, Nyl. thallus nearly evanescent ; apothecia 

 black, minute,, convex, immarginate, dispersed, internally obscure ; % 

 epithecium nigrescent ; paraphyses indistinct; hypothecium fuscous; 

 spores 8, colourless, oblong, simple ; gelatina hymenea cserulescent, 

 then dusky-vinous with iodine. 



On old fir pales in sub-alpine localities, rare. 1870. 



Stn :— Nyl. Lapp. Or. 148 (1866.) Crombie in Seem. Journ. 9. 178. 

 Exs :— Am. 408. 

 Geog. Distbib :— E. Lapland. 

 Bot. Prov : — 15. 



Scotland :— Pass of Killiecrankie in Blair Athole. Rev. J. M. Cromhie. 

 "Spores .008 — .015 mm. long, .003 — 4 mm. broad." (Nyl.) "Spermogonia 

 ■ papillaeform ; spermatia shortly cylindrical, slightly curved somewhat at each 

 apex .0030—35 mm. long." (T. M. Fries.) 



187. L. deparcula, Nyl. greyish, thin, sub-areolate, dispersed, 

 evanescent, hypothallus black, but little conspicuous ; apothecia 

 black, small, somewhat difformed, slightly prominent, subumbonate, 

 in the centre, concolorous within, margin obtusely turgid and some- 

 times 8ubcrenate ; hypothecium brownish-black; spores 8, colour- 



