390 Rev. W. A. Leigliton on the British Grapliidejr. 



branous border, containing 11-13 transversely oval margined 

 spores. 



Opegrapha elegans, Sm. E. Bot. t. 1812 (1807) ; Fries, L. Ref. 370 ; Hook. 



Br. Fl. 2. 146; Schser. Emim. 152 j Exsic. 515! Bohler, Lich. Brit. 27! 



scripta, rj. elegans, Sch^er. Spicil. 323 (1823-1836). 



Graphis elegans, Ach. Syn. 85 (1814); Spreng. Syst. Veg. 4. 1. 250. 



pulverulenta, 8. geminata, Wallr. Crypt. Germ. 331 (1831). 



Opegrapha sulcata, Moug. & Nestl, Stirp. Vog. 360 ! (1813); "DeCatid. 



Fl. Fran?. 6. 171." (Me Fries) ; " Duf. Journ. de Phys. 87. p. 222. 



n. 22." (fide Schter.); Tayl. Fl. Hib. pt.2. 107. 

 Aulacographa elegans, Leight, Lich. Brit. Exsic. 68 ! (1852). 



Sussex, on various trees, finest on holly ! Mr. Borrer. Near 

 Ashbourne, Derbyshire ! Scotland ! D?-. R. K. Greville. Oxford- 

 shire ! Mr. Baxter in herb. Greville. Crafnant, Shropshire ! 

 Rev. T. Salwey. East and north sides of Bardon Hill, Leices- 

 tershire ! Gracedieu, Leicestershire ! ^ev. A. Bloxam. St. Leo- 

 nardos Forest, Sussex ! Tunbridge Wells ! Mr. W. Thompson. 

 Berrow Wood ! and Holly-bush Hill ! Malvern Hills, Worcester- 

 shire, Mr. E. Lees. Thorndon Hall Park, Essex ! Mr. H. Piggot. 

 Riverstone ! and Ballymartle ! co. Cork, Mr. I. Can-oll. 



Gloddaeth near Conway, Caernarvonshire ! Haughmond Hill, 

 Shropshire ! 



Thallus forming large roundish uninterrupted patches of seve- 

 ral inches extent, with a pale irregular border, except when it 

 meets with other lichens, when a narrow brownish line or border 

 makes its appearance, of a pale cream colour or whitish, or whitish 

 gray, sometimes somewhat shining, generally dull, either thin, 

 membranaceous, continuous and covered with minute granular 

 protuberances, or thicker and subtartareous, rugose and cracked. 

 Lirella numerous, scattered in all directions, mostly simple, but 

 by confluence, or more correctly speaking, by contact, appearing 

 branched, sometimes so thickly congregated in groups as to be 

 radiate, and on the birch affecting a subparallel arrangement, in 

 size as various as in direction and arrangement, short and stout, 

 oblong or linear-oblong, obtuse at the ends, or very elongate, 

 linear and slender, straightish or wavy and curved, and slightly 

 tapered towards each extremity, all erumpent and prominent, 

 bursting upwards through the crust which remains as a thin 

 accessory border appressed along the sides and base of the lirellse, 

 and also as a film investing and filling up the furrows of the 

 prominent proper margins, giving them in contrast with their 

 full black colour a variegated pulverulent aspect. Disk very 

 narrow, merely a simple chink, almost closed by the incurvature 

 of the thick stout prominent rounded proper margins, which are 

 marked by deep distinct uninterrupted longitudinal furrows. 

 The number of these furrows is very variable, sometimes only a 

 single one on each side the disk, sometimes 2, 3 or even 4. 



