OF GREAT BRITAIN. 89 



then ferruginous-red; apothecia marginal and subterminal ; recep- 

 tacle nearly smooth ; spores 8, colourless, oblong, straight, 1 -septate ; 

 spermogonia in pale colourless receptacles, sometimes nigricant. 

 On maritime rocks, rare, 



^YN : — Lichen scopulorum, Dicks. Crypt. Brit. 3. 18. R. scopulorum, Ach, 

 L. V. 604, Syn. 297 ; Nyl, Mon. Eamal. 58. Leight. Not. Lich. 35 ; Crombie, 

 1. c. 74. 



Fig :-B.Bot. 688 ; Nyl. Syn. t. 8. f. 29. 



Exs :— Larbal. 13 : Bohl. 112. 



GrEOQ. Dibtrib : — Europe, Africa. 



Bot. Prov:— 1, 2 ..6...16...31. 



England :— Lamorna Cove, Cornwall. Mr, Knapp, Land's End, Messrs. 

 Turner & Sowerby. South Coast of England. Mr. Forster. Leigh Tor, Devon, 

 Dr. Hott. Hightor Bocks, Devon. Msssrs. Jones and Kingston. 

 : Scotland : — Mr. Dickson (1. a). Isle of Arran. Mr. Lyle. Kincardineshire 

 ?ind Orkney. Rev. J. M. Crombie. Isle of May. Firth of Forth. Mr. Sadler, 



Ireland : — Ardglass, Down. Mr. Lyle. 



Wales : — Aberystwith. Mr. Forster. Harlech Castle ! 



Channel Islands ; — Grosnez Common, Jersey ! Mr. Larbalestier. 



" Spores .012—19 mm. long, .0045—0065 mm. broad." (Nyl, ) 



Var. subfarinacea, Nyl. M.S. very similar in general external 

 appearance to R. farinacea, but the soredia and medulla K yellow 

 then ferruginous-red. 



On subalpine and maritime rocks, not common. 



Syn : — Crombie 1. c. 74. 



Exs :— Nyl. Pyr. or. 24. 



Bot. Prov:— 1, 2...5...7...10...15...31. 



England : — Lanbraugh, Cleveland, Yorkshire ! Mr. Mudd. Blackingston 

 Bocks ! Devon. Mr. Parfitt, Malvern Hills. Dr. Holl. Plymouth ! Mr. Holmes. 

 Ardingley, Sussex. Mr. W. Joshua. Penzance. Mr. Cnrnow. Longmynd ! Shrop- 

 shire. 



Scotland: — Portlethen, Kincardineshire. Craig Tulloch. Rev. J.M. Crombie. 

 Kinnoul Hill, Perth . Dr. Lindsay. 



Wales : — Beddgelert ! Towyn ! Harlech Castle ! Moel-y-Golfa ! 



Channel Islands : — La Coupe, Jersey ! Mr, Larbalestier. Scilly Islands. 

 Mr. Curnow. 



Var. incrassata, Nyl. thallus thick, rigid, tuberculoso-difformate, 

 shortly laciniate, sparsingly divided, opake ; external cortical layer 

 amorphous, internally filamentose ; medulla K yellow then red- 

 dish. 



On maritime rocks, rare. 1873. 



Syn :— Nyl. Ramal. p. 59. (1870.) 



Geog. Dibtrib :— West France and Canaries. 



Bot. Prov :— 7...31. 



Wales :— Harlech Castle ! 



Channel Islands : — La Moye ! Mont Orgueil Castle, Jersey ! Mr. Larba- 

 lestier (1873). 



In general appearance like B. polymorpha, Leight. Exs. 73, but smaller, and 

 distinguished by different structure of the cortical layer and chemical reaction 

 of the medulla. 



10. R. cuspidata, (Ach.). pale straw-colour, rigid, cartilaginous, 

 shining; lacinia elongate, linear, compressed, more or less longi- 

 tudinally striato-nervose, lacunose and sorediato-tuberculate, simple 

 or dichotomously branched; cortical layer solid, external portion 

 amorphous, internal portion filamentose ; medulla K — ; apothecia 

 marginal and subterminal ; receptacle smooth ; spores 8, colourless, 

 oblong, straight, 1 -septate ; spermogonia in pale colourless recep- 

 tacles, 



