OF GREAT BRITAIN. 193 



forma contorta, Hoffm. white or cinerascent, areolae dispersed, 

 centrally elevated, depressed at the edges; apotheoia immersed. 

 On calcareous rocks, frequent. 



Stn :— Hoffm. PI. Lich. 1. 97. (1790.) Th. M. Fries Lich. Scand. 275. 

 Fig ;— Hoffm. PL Lich. t. 22. f. 3. 

 Exs :— Mudd 134. Leight. 322. Anzi It. S. 210. 

 Geog. Distrlb : — Italy, Scandinavia. 

 Bot. Peov :— 5...7...10...26. 



England :— Roseberry ! Yorkshire. Mr. Mudd. High Rook I Bridgnorth, 

 Shropshire. 

 Ireland : — Twelve Pins ! Doughruagh ! Connemara. Mr. LarbaUstier. 

 Wales : — Great Orme's Head 1 



forma Hoffmanni, (Ach.) glaucescent, areolae sub-contiguous, apo- 

 thecia larger and more elevated. 

 On granite and other hard rocks, frequent. 



Stn:— Ach. Meth. 145. (1803.) Syn. 143. Nyl. Scand. 154. Th. M. Friea L- 

 Scand. 275. 



Fig :— Hoffm. PL L. t. 22. f. 1. 2. 3. Hoffm. En. t. 6, f. 3. Mass. Ric. f. 75. 

 E. Bot. 1. 1940. 



Exs :— Hepp 629. Schasr. 131. Anzi Langob. 324. Anzi Venet. 46. 47. Nyl. 

 Pyr. Or. 59. 



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



Bot. Pbov :-3, 4, 5...7...10 ..26. 



England :— Oswestry ! Bev. T. SaZwey. Malvern Hills ! Mr, Zees. Kenilworth 

 Castle 1 Mr. LarbaUstier. Yorkshire ; Sussex and Norfolk. Sir J. E. Smith. 

 King's Weston Down ! Bristol. Mr. Perceval. Aymestry ! Herefordshire. 

 Llanymynech Hill ! Haughmond Hill ! Shropshire. 



Ireland : — Top of Kylemore Mountains ! co. Galway. Mr. LarbaZestier. 



Wales : — Bryn Maelgwyn ! Llanyblodwel Rocks 1 



forma ochracea, (SchEer.) cinereo-ochraceous, areolato-diffract ; 



apothecia immersed. 



On slaty rocks, rare. 1877. 



Stn :— Senear. Spic 72. 



Exs :— Schajr. 128. Anzi Langob. 69. 



Geog. Distrib : — Switzerland, Italy, Hungary, 



Bot. Prov :— 7. 



Wales :— Moel-y-gest! near Tremadoe (1877). 



52. L. lactea, (Mass.) milk-white, tartareo-farinose, contiguous, 

 effuse ; apothecia pallido-testaceous, at length fuscescmt, most 

 minute, at first immersed, then sessile and sub-concave ; spores 

 8, colourless, elliptieal or elliptico-oblong, simple. 



On walls, rare. 



Stn :—Aspicilia, Mass. Symm. p. 26. (1855). 



Geog. DisTBrs: — Italy. 



Bot. Prov:— 5. 



England : — Near Cirencester. Mr. Joshua. 



" Spores .009— .0122 mm. long, .00244— .00366 mm. broad." {Mass.) 



53. L. gibbosa, (Ach.) cinereous or virescenti-fuscous, angulari- 

 areolato-verrucose, fertile ones elevated in the centre ; hypothallus 

 pale ; apothecia areolate, immersed, urceolate, or emersed, concave 

 or plane, naked, thatline margin slightly crenulate; spores 

 8, colourless, 'ellipsoid, simple, large ; hypothecium colourless ; . 

 paraphyses gelatinoso-concrete ; gelatina hymenea at first slightly 

 blue then vinoso-fulvescent with I ; medulla I — / thallus K — ■ 

 G — ; spermatia acicular, straight. 



On granitic and hard rocks, frequent. 



