OP GREAT BRITAIN. 139 



Var. hypoleuca, (Ach.) under surface of thallus white, rhizince 

 and marginal cilice black. 

 On rocks. 1875. 



Stn :— Ach. Syn. 211. (1817.) Nyl. Syn. 417. 

 Fig :— F<5e Ess. Suppl. t. 38. f. 2. 

 Exs :— Wright 80. Spruce 152. 153. 



Geog. Distelb : — North and Central America, Cape of Good Hope, Island 

 of Bourbon, East Indies, Java, Cuba, Ceylon, Mauritius. 

 Bot. Peov:— 15...26. 



Scotland : — Glencroe ! Dr. MacmMlcm. (1875.) 

 Ieeland : — Dawros River ! Mr. Larbalestier. 



12. P. erosa, (Borr.) greyish or glaucous-white, crowded, imbri- 

 cate, rotundo-abbreviato-laciniate, minutely-albo-granulate, margins 

 of laciniaB minutely jagged or crenulate, frequently ascending and 

 granulate ; apothecia fuscous-black, margin sub-entire ; spores 8, 

 fuscous, oblong, 1-septate ; (thallus Ky Cy). 



On trees, walls, &c. 1837. rare. 



The surface of the thallus is minutely albo-granulate not subcortically albo- 

 maculate as in P. stellaris and its varieties. 



Stn :— E. Bot. Suppl. 2807. (1837.) tribacia (in part), Ach. Syn. 191. Nyl. Syn. 

 425. 



Fig :— E. Bot. Suppl. 2807. 



Exs :— Larb. 24. Arn. 272. 248. Leight. 266. 



Geog. Distkib:— Europe. 



Bot. Peov:— 1, 2...5...7...10...15, 16.. .19. ..31. 



England :— Hurstpierpoint, Sussex. Mr. Borrer. near Ayton, Cleveland. Mr. 

 Mudd. Ludlow Castle, Shropshire. Bev. T. Salwey. Plymouth ! Mr. Holmes. 

 Treveneth, near Penzance. Mr. Gwmow. 



Scotland : — Connel Ferry, Argyleshire. Mr. Borrer. Will's Braes; Auldbar. 

 Mr. Gardiner. 



Ieeland :— Dargle. Dr. Taylor. 



Wales : — Llanaber ! near Barmouth. Bev. T. Salwey. Aberdovey ! 



Channel Islands : — Quenvais ; St. Ouen's Bay 1 Jersey ! Mr. Larbalestier. 

 Guernsey. Bev. T. Salwey. 



13. P. astroidea, (Clem.) greyish-white, orbicular, thin, closely 

 appressed, almost entirely granulose or leprose, laciniato-effigurate at 

 the circumference ; apothecia fuscous-black, naked or pruinose ; 

 spores 8, fuscous, elliptico-oblong, 1-septate, cells nucleolate ; (me- 

 dulla Ky Cy). 



On trees, rare. 1807. 



Stn :— Clem. Ens. (add.) 302. (1807.) P. Glementiana, Ach. Syn. 204. Nyl. 

 Syn. 426. Mudd Man. 108. 



Fig :— E. Bot. 1779. Linn. Trans, t. 13. f. 1. Hepp Sporen t. 69. f . 601. 



Exs :— Hepp 601. Schaer. 610. M. & N. 737. Welw. Lusit. 104. Anzi Langob. 9. 



Geog. Distrib : — Europe, America. 



Bot. Peov :— 1, 2, 3, 4.. .7, 8.. .10.. .19.. .24 ..31. 



England :— Sussex ! Tunbridge Wells and Southampton. Mr. Borrer. Pen- 

 zance ! Bev. T. Salwey. near Settle. Dr. Windsor, near Stokesley, Cleveland. Mr. 

 Mudd. Kelvedon, Essex. Mr. Varewne. Twycross, Leicestershire ! West Haddon, 

 Northamptonshire. Bev. A. Bloxam. Plymouth! Broom Park, near Sibertswold ! 

 Kent. Mr. Holmes. 



Ieeland :— Tervoe near Limerick 1 and Dims, Killarney. Mr. Carroll. Dun- 

 kerron ; Blackwater Bridge, Kerry. Dr. Taylor. 



Wales :— Barmouth ! Bev. T. Salwey. 



Channel Islands :— Jersey. Mr. Larbalestier. ,„,„„„ 



" Spores .0045 in. long, by .0015 to .002 in. broad." (Mudd.) " Spores .017— 

 26 mm. long, .008— .011 mm. broad." (Nyl.) 



Var. elegant, (Nyl.) albo-glaucescent, margins of lacinim delicately 

 isidioso-fimbriate, 



Ieeland :— South side of Kylemore Lake, Galway. Mr. Larbalestier. (1876.) 



