OK GREAT BRITAIN. 449 



Bot. Peov :— 1, 2, 3...5...T. 



England : — Sussex ! Mr. Barret: (1807.) Bagley Wood ! near Oxford. Mr. 

 Jenner. Salcombe Hill, Sidmouth ; Exmouth. Mr. Parfitt. Kelvedon, Essex. 

 Mr. Varenne. Farm Road, Park, Cirencester. Mr. Joshua. Wrekin Hill ! 

 Alberbury ! near Shrewsbury ! Shropshire. 



Wales : — Craig Breidden 1 Montgomeryshire. 



"Spores .003 in. long, by .001 to .00125 in. broad." (Mudd.) Spores .008— 

 .012 mm. long, .0055— .007 mm. broad. 



11. V. Icevata, Ach. dirty-whitish or pale-greyish-brown, thickish, 

 tartar eo-cartilaginous, smooth, continuous or eventually rimulose or 

 rimuloso-areolate ; apoiliecia immersed in and covered by the 

 thallus, small, partially emerging ; ostiolum black and polished, 

 conical, more or less denuded ; epithecium poriform, impressed ; 

 peritJiecium thickish, black, entire ; spores 8, colourless, elliptical, 

 simple, moderately large ; paraphyses none ; gelatina hymenea 

 vinous-red with iodine. 



Kocky beds of mountain streams, not common. 1830. 



Stn :— Ach. L. U. 284. (1810.) Syn. 94. Leight. Ang. Lioh. 44. Mudd Man. 

 286. 



Pig :— E. Bot. Suppl. t. 2623. f. 2. Leight. Ang. Lioh. t. 19. f. 1. & 2. 



Exs :— Leight. 198. Mudd 272. 273. Kabh. 774. M. & N. 952. 



Geog, Distrib :— Germany. 



Bot. Peov:— 5...7...10, 11.. .19. 



England : — North of England ! Teesdale ! Tyne near Newcastle ! Mr. 

 Bobertson. (1830.) near Ayton ! Airyholme Wood ! Cleveland. Mr. Mudd. 

 Bishop's Stow, Torquay. Mr. Parfitt. Kiver Oney between Abdon and Tugford ! 

 Kiver Morda under Craigforda, Shropshire ! 



Ireland : — Killarney, Sir T. Gage. Middle Koad ! and Sunday's Well 

 Weirs ! near Cork. Mr. Carroll. Dunkerron ! Dr. Taylor. 



Wales : — Between Llangollen and Corwen ! ; Barmouth ! 



" Spores .004 to .0045 in. long, by .0015 to .002 in. broad." (Mudd.) Spores 

 .020 mm. long, .011 mm. broad. 



Var. nigrata, Leight. umbrino-nigricant, covering the numerous, 

 crowded, rather large apothecia. 



On stones in running water, rare. 1876. 

 England : — Ched worth ! Gloucestershire. Mr. Joshua. (1876.) 



12. V. prominula, Nyl. greyish-white or pale-brown, thin, tar- 

 tareous, continuous, rugulose, effuse ; apothecia black, large, 

 prominent, subglobose, scattered ; epithecium very slightly 

 depressed, poriform; perithecium entire; spores 8, colourless, 

 broadly oblong or elliptical, simple, granular. 



On maritime rocks, rare. 



Stn — Nyl. in litt. Mudd Man. 291. (1861.) Carroll in Seem. Journ. Bot. 4. 

 25. 



Geog. Distrib: — Europe. 



Bot. Peov:— 1...19...22. 



England : — Exmouth. Mi: Parfitt. 



Ireland :— Derryquin, Kerry. Dr. Taylor. In a cave at the Diamond rocks, 

 Kilkee. Clare. Mr. Carroll. ,,,,,, 



" Spores .0025 in. long, by .0015 to .00175 in. broad." (Mudd.) 



*** Thallus rimuloso-areolate. 



13. V. maura, Whlnb. coal-black or darhreddish-black, thick, 

 smooth, minutely coarsely rimuloso-areolate, somewhat polished and 

 shining, areolce either smooth or covered with very minute papillce or 



