OF GREAT BRITAIN. 281 



forma elacista, (Ach.) greyish-white, very thin, effuse, Uprose; 

 apothecia innate or sessile, ooncave or plane, with a conspicuous 

 white coarctate margin. 



On walls and stones, frequent. 1798. 



Stn :— Ach. Meth. 159. (1803.) Syn. 149. Nyl. Prodr. 112. Mudd Man. 154. 



Fig :-E. Bot. t. 534. (1798.) Ach, Meth. t. 4. f. 4. Hepp Sporen t. 21. f. 186. 



Exs :— Nyl. L. P. 54. Schaer. 312. Leight. 177. 



Geog. Distrib : — Prance, Switzerland, Hungary, Italy, Sweden. 



Bot. Prov :— 1, 2, 3, 4, 5.. .7.. .10, 11...15...30, 31. 



England : — Yarmouth. Mr. Turner, (1798.) Yorkshire ! Mr. Dickson. 

 Oswestry ! Shropshire. Rev. T. Salwey. Newton Wood ! near Ayton ! Cleve- 

 land. Mr. Mudd. Gateshead Fell ; Eglestone and Gainford, Durham ; Heaton 

 Dene and near Gosforth, Northumberland. Mr. Winch. Valley of Bocks, 

 Linton, Devon. Mr. Parfitt. Braxted, Essex. Mr. Varenne. Plymouth, Mr. 

 Holmes. Leith Hill, Surrey: Hastings. Mr. W. Joshua. Seven Oaks, Kent. Mr. 

 Holmes. Wickliff Bocks ! Ludlow ; Hopton ! near Nesscliffe ; Nordy Bank, 

 Abdon ! Long Mynd ! near Church Stretton, Shropshire. 



Scotland : — Killin ! Mr. Piggot. Birnam Hill ! Dunkeld. Dr. Lindsay. Craig 

 Tulloch. Blair Athole. Rev. J. M. Crombie. 



Ireland : — Near Belfast. Mr. Templeton. 



Wales :— Moel-y-Golfa ! Montgomeryshire. Pentregaer ! near Oswestry ! 

 Cader Idris ! Trefriw Falls ! Eglwseg rooks ! 



Channel Islands :— Jersey ; Guernsey. Mr. Larbalestier. 



forma involuta, (Tayl.) greyish-white, tartareous, verrucose or 

 areolato-granulose, verrucce often scattered, convex or flattish ; 

 apothecia fusco-rufescent, concave or more or less convex, sessile, 

 margin obliterated. 



On siliceous rocks, not unfrequent. 1S36. 



Syn :— Lecanora, Tayl. ! in Mack. Fl. Hib. 2. 134. (1836.) Nyl. Scand. 190. 



Fig :^-Leight. Ang. Lich. t. 13. f. 4. 



Exs :— Mudd 124. Hepp 186. Mass. 323. 



Geog. Distrib : — Germany, Hanover, Italy. 



Bot. Prov :— 5, 6, 7...10...19...26. - 



England :— Newton Wood ! Cleveland. Mr. Mudd. Haughmond Hill ! Caer 

 .Caradoc ! Sharpstones ! Lyth Hill ! near Shrewsbury, Shropshire. 



Ireland :— Carig ! and Dunkerron Mountains. Dr. Taylor. (1836.) Mweerlan ! 

 Bynvyle ! Dawros river ! near summit of Doughruagh Mountain ! Twelve 

 Pins ! co. Galway. Mr. Larbalestier. 



Wales : — Yr Eifl ! Mr Holmes. Cwm Glas ! Snowdon. Trefriw falls ! 

 Cwm Cywion ! Drwsynant ! Pass of Llanberis ! Aran Mowddwy : Eglwyseg 

 rocks ! 



Spores .0195 mm. long, .015 mm, broad. 



forma glebulosa, (Sm.) whitish, tartareous, verrucoso-glebulose or 

 sub-squamalose, verrucse tumid, scattered or crowded ; apothecia 

 minute, rufo-fuscescent, plane, margin thin, evanescent. 



On shady rocks, not unfrequent. 1808. 



Syn:— Sm. E. Bot. 1955. (1808.) 



Fig :— E. Bot. 1955. 



Exs :— Leight. 149. 



Geog. Distrib :— Europe. 



Bot. Prov :— 1...3...5...7, 8.. .10. ..15. 



England :— Great Ayton ! Carlton Bank. Yorkshire. Mr. Mudd. near 

 Exeter. Mr. Parfitt. Penzance, Mr. Carnow. Tunbridge Wells. Mr.- Holmes. 

 Caer Carodoc ! Stableford ! near Bridgnorth, Shropshire. 



Scotland :^Craig Tulloch. Rev. J. M. Crombie. 



Wales : — Aberdovey ! 



forma ornata, (Smmrf.) greyish-white, verruculose or areolato- 

 squamulose, squamules flat or more or less irregularly convex, 

 margins more or less crenate. 



