194 THE LICHEN-PLOEA 



forma vulgaris, (Th. Fr.) dirty-whitish or cinereous, thick, tar- 

 tareous, areolato-verrucose ; wpolliecia more or less emersed, concave 

 or plane, ocellate. 



Stn :— Ach. Prod. 30. (1798.) Syn. 139. NyL Soand. 154. Th. Fr. L. Scand. 

 276. 



Pig :— Hepp Sporen t. 71. f. 624. 



Exs :— Zw. 60. Hepp 624. Schier. 125. 



Geog. Distbib : — Norway, Hungary, Switzerland, Pyrenees, Italy, Germany. 



Bot. Pbov :— 5, 6...26. 



England :— Oswestry ! Bev. T. Satwey. Lydd Beach, Kent. Mr. Holmes. 

 St armor Hill ! Herefordshire. 



Ireland : — River Dawros ! co. Galway. Mr. Larbalestier. 



Wales : — Between Llangollen and Corwen ! Aber ! Carnarvonshire. Bar- 

 mouth ! Criceieth Castle rock ! 



"Spores .021-30 mm. long, .014—18 mm. broad." (T. M. Fr.) Spores 

 .024 mm. long, .017 mm. broad. 



forma porinoidea, Flot. Awck-virescemti-fuscous, opake, smooth, 

 areolato-verrucose, areolse very convex, mbhemispherical ; apothecia 

 immersed, thalline margin coarctate, sometimes crenulate, often 

 paler. 



Stn :— Plot. L. Siles. 128. (1849.) Korb. Syst. 163. 



Pig :— E. Bot. 1. 1732. 



Exs :— Mudd 135. Leight. 175. 



Geog. Distklb:— Europe. 



Bot. Pbov:— 2...5...7...10. 



England :— Clifirigg, Yorkshire ! Mr. Mudd. South Downs, Sussex. Mr. 

 Borrer. Haughmond Wffl ! Lyth Hill ! Caer Caradoc ! Long Mynd ! Abdon 

 Burf ! 



Wales :— Craig Breiddin ! Montgomeryshire. Aber ! Carnarvonshire. 



Forma squamata, Flot. daxk-virescentirfuscous, opake, smooth, 

 areolato-verrucose, closely appressed, radiato-effigurate at the circum- 

 ference ; areolae convex or subhemispherical ; apothecia immersed, 

 thalline margin coarctate, often crenulate. 



Stn : -Flotow L. S. Siles. 128. (1849.) Korb. Syst. 163. Th. Fries L. Scand. 

 276. 



Exs : — Leight. 175. (in some copies.) 



Bot. Pbov : — 5. 



England : — Caer Caradoc ! 



Probably only a state of f. porinoidea in which the circumference is 

 developed. 



forma depressa, Ach. ccesio-ciner ascent, areolate, areola small, de- 

 pressed, plane ; apothecia immersed, areolato-impressed, sub-leci- 

 deine. 



On alpine rocks, rare. 1870. 



Stn :— Ach. Syn. 144. (1817.) Nyl. Scand. 153. CrombieEn. 55. 



Geog. Distbib : — Sweden, Lapland, Norway. 



Bot. Pbov :— 15... 19. 



Scotland : — Ben Lawers. Bev. J. M. Orombie. 



Ireland :— Dunkerron. Dr Taylor. 



54. L. caesio-cinerea, Nyl. albido-cinereous, ccesio-cinereous, thickish, 

 areolato-verrucoso-diffract (medulla I — thallus K dirty-fuscescent) ; 

 apothecia immersed in the areolae, concave, surrounded with a white 

 thalline margin, at length emerged and more or less prominent ; 

 spores 8, colourless, oblong, simple. 



On mountain rocks, not common. 1876. 



Exs ;— Aiizi Langob. 323. 



