OF GRKAT BRITAIN. 335 



raised margin, eventually convex and immarginate ; hypotheclum 

 colourless ; hymenium narrow, seated on a pale-yellow thin stratum 

 which rests on a white opake stratum, subtended by a lateral 

 yellow excipulum ; paraphyses distinct,apices nigricant ; spores 8, 

 colourless, oblong or elliptico-oblong, 1-septate, large. 

 On trees, mountain-ash, alder, rare. 1807. 



Syn :— Borrer in E. Bot. Suppl. 2726. (1831.) Mudd Man. 180. 



Fig :— E. Bot. Suppl. 2726. 



Geog. Distrib : — Europe. 



Bot. Prov:— 2...7...12...15...19...26. 



England :— New Forest. Mr. Lyell. Keswick, ! Cumberland. Mrs. Stanger. 

 near Danny, Sussex. Mr. Larbalestier. Ardingley, Sussex. Mr. W. Joshua. 



Scotland : — Aberfeldy ! Glen Falloch near Inverarnan. Dr. Holl. Loch 

 Lomond. Rev. J. M. Grombie. 



Ireland : — Glengariff. Adm. Jones. Old Dromore. Dr Taylor. Cromaglown, 

 Killarney . Dr. Moore, near Killarney. Mr. Carroll. Letterfrack ! Lough Muck ! 

 co. Galway. Mr. Larbalestier. 



Wales : — Capel Owm, Barmouth ! Rev. T. Sahvey & Mr. Borrer, Llanbedr 

 Valley. Mr. Holmes. Glyn ! near Capel Curig. Trefriw ! Capel Arthog ! Gaer 

 Ditches ! 



Not unlike the commutata form of L. Lightfootii, but differs in size and shape 

 of the spores and chemical reaction. " Spores .003 — .0035 in. long, by .00125 

 in. broad." {Mudd.) Spores .016— .018 mm. long, .0075— .0085 mm. broad. 



tl Apothecia livido-fuscous to black. 



250. L. lenticularis, Ach. brownish or nigricant or cinereo- 

 fuscescent, thin, indeterminate or evanescent, (K — C — ) ; apothecia 

 livido-fuscous, rufo-fuscous, black or fuscous-black, small, plane, 

 marginate ; hypothecium colourless ; spores 8, colourless, oblong or 

 lineari-oblong, 1-septate, small. 



On mountain and maritime rocks, not unfrequent. 



Syn :— Ach. Syn. 28. 0814.) Nyl. Scand. 242. 



Geog. Distrib :— Switzerland, Germany, Italy, N. Africa, Denmark, Sweden, 

 Norway, Finland 



Bot. Prov :— 7...(19— 30J...31. 



" Spores .007— .011 mm. long, ,003—4 mm. broad." (Nyl.) " Spores .006— 

 .011 mm. long, .002 — 4 mm. broad." (T. M. Fries.) 



forma vulgaris, (Korb.) albido-cinerascent or cinerascent, sub- 

 pulverulent, scarcely granulose, thin, indeterminate ; apothecia 

 rufo-fuscous or fuscous-black. 



On rocks, frequent. 



Syn:— Korb. Par. 144. T. M. Fries Lich. Scand. 568. 



Exs :— Zw. 272. Anzi Ven. 67. Ital. S. 254. Langob. 120. 



Bot. Pbov:— 2...7...15...26. 



England : — Beachy Head ! Mr. Holmes. 



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



Ireland : — Lough Corrib ! Mr. Larbalestier. 



Wales : — Eglwyseg rocks ! Nant Gwynant ! 



forma pulicaris, (Mass.) pallido-fuscescent, smooth, thin, continuous, 

 indeterminate ; apothecia nigro-fuscous or rufescent, small. 

 On rocks, not unfrequent. 



Syn :-Mass. Kic. 136. (1852.) 

 Fig :— Mass. Ric. fig. 267. 

 Exs :— Anzi Ven. 69. 

 Bot. Prov :— 7.. .26. 



Ireland : — Twelve Pins ! Westport ! Doughruagh ! near Lettermore ! Con- 

 nemara. Mr. Larbalestier. 

 Wales :— Trefriw ! Holyhead Mountain ! 



