OF GREAT BRITAIN. 159 



Ireland : — On rocks, not unfrequent. Mr. Carroll, near Belfast. Mr. Temple- 

 ton. Kerry. Dr. Taylor. Lough Inagh. Mr Larbalestier. 



Wales : — Llyn Geirionydd ! Dolgelley ! Diganwy ! near Conway. 



Channel Islands ; — Guernsey. Rev. T. Salwey. Jersey. Mr. Larbalestier. 



" Spores .0025 in. long, by .001 in. broad." (Mudd.) " Spores .010— 16 mm. 

 long, .006—7 mm. broad." (Nyl.) "Spores .009—15 mm. long, .005— 7 mm. 

 broad." (2". M. Fr.) 



Var. diffracta, (Ach.) areolato-diffract, areolae contiguous, angular, 

 nigro-marginate. 

 On rocks. 



Syn :— Ach. L. IT. 432. (1810.) Syn. 180. Nyl. Scand. 133. Mudd Man. 129 



Exs :— Leight. 81. Mudd 93. Mass. 360. Anzi Langob. 269. 



Geog. Disteib :- Europe. 



Bot. PKOV-5...7...19...15. 



England :— Cliff -Bigg ! near Ayton ! Lanbraugh Bigg ! Cleveland. Mr. 

 Mudd. Haughmond Hill ! Shropshire. 



Scotland : — Monument Hill, Perth ! Abernethy ! Ben Lawers ! Dr. Lindsay. 

 Craig Guie in Braemar. Rev. J. M. Crombie. 



Wales : — Criccieth Castle ! 



Var. versicolor, (Pers.) albo-flavescent, more or less albo-suffused, 

 the upper surface of lacunae towards the circumference minutely 

 albo-depresso-granulate, margin of apothecia entire, often albo- 

 pulverulent. 



On rocks and moss. 1856. 



Syn :— Pers. in Ust. N. Ann. Bot. st. 7. p. 24. (1794.) Ach. Syn. 184. Nyl. 

 Scand. 133. 



Fig ;— Hepp Sporen t. 102. f . 899. 



Exs :— Anzi Venet. 30. It. S. 161. Langob. 41. Hepp 899. 



Geog. Disteib :— Europe. 



Bot. Pbov :— 2.. .5, 6, 7. ..15. 



England :— On roof tiles, Basingstoke ! Hants ! Mr. Rob. Southey Hill. (1856). 



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



Wales :— Llyn Geirionydd ! St. David's ! Pembrokeshire. Castel Diganwy ! 

 near Conway. Barmouth ! Llanymynech Hill ! 



Var. albo-marginata, (Nyl.) margins white. 

 On decayed mosses on walls. 



Stn :— Nyl. in Sallsk. pro. F. et H. F. Not. xi. p. 181. 

 England : — Near Lewes, Sussex. Rev. J. M. Crombie. 



Forma dispersa, (Leight.) albo-pulverident, in scattered, distant, 

 round, tumid, convex, minute masses, in which the minute apothecia 

 are crowded and imbedded. 



On calcareous rocks, rare. 1874. 



Wales :— Great Orme'a Head ! (1874). 



6. S. gelida, (L.) dirty creamy-white, smooth, crustaceous, closely 

 adnate, orbiculari-radiose, plane, areolato-diffract in the centre, 

 radiato-laciniate at the circumference, truncato-crenate, with central 

 carneo-cinerascent depresso-verrucaroid radioso-rimose cephalodia ; 

 apothecia pale reddish, margin tumid entire ; spores 8, colourless, 

 ellipsoid, simple. 



On alpine rocks, frequent. 1782. 



Stn:— Linn, Mant. 2. 133. (1771). Ach. Syn. 186. Nyl. Scand. 134. Mudd 

 Man. 129. 



Fig :— E. Bot. 692. Hepp Sporen t. 89. f. 773. 



Exs :-Hepp 773. Th. M. Fr. 31. Am. 430. 



Geog. Disteib : — Norway, W. Finland, W. France, N Zealand. 



Bot. Peov :— 1...5...7...11, 12...15...17, 18, 19...26...30. 



