392 THE LICHEN-KLORA 



4. X. flexella, (Ach.) whitish ; apothecia black, minute, superfi- 

 cial, oblong ; epithecium rimaeform or irregularly dilated ; hypo- 

 thecium fuscescent ; spores 8, colourless, globoso-ellipsoid, ovoid or 

 ellipsoid, simple, most minute. 



On decorticated stumps, not common. 1875. 



Syn :—IAmhoria, Ach. Vet. Ak. Hand! 1815, p. 258. and 1817. p. 222. Xylo- 

 grapha, Nyl. Scand. 250. 



Exs :— Arn. 525. M. & N. 1094. 



Geog. Distbib :— Switzerland, Germany, Sweden, Norway, Lapland, Arctic 

 America. 



Bot. Pbov : — 5. 



England : — Oakley Park, near Cirencester ! Mr Joshua. (1875.) 



"Spores .004—5 mm. long, .002—3 mm. broad." {Nyl.) " Spores .004— 6 

 mm. long, .002—3 mm. broad." (T. M. Fr.) Spores .004 mm. long, .002 mm. 

 broad. 



II. PTYCHOGKAPHA, Nyl. 



Thallus effuse, macular. Apothecia prominent, parallel, with 

 2 or 4 longitudinal hymenia in each Spores 8, colourless, simple. 

 Gelatina hymenea I vinose-red. 



1. P. xylographoides, Nyl. greyish-white, macular, or nearly 

 obsolete, internally with the gonidia sub-glomerated ; apothecia 

 black, lanceolate, somewhat prominent, above plane ; epithecium 

 usually longitudinally 1-or 3-plicated, margined, within concolorous ; 

 spores 8, colourless, ellipsoid, simple ; epithecium nearly colour- 

 less ; hypothecium and perithecium black ; gelatina hymenea I 

 vinous-red. 



On decorticated mountain-ash. 1874, 



Stn :— NyL in. Flora 1874. p. 315. Crombie in Journ. Bot. n. s. 3. 257. 



Fig : — Journ. Bot. 1. c. t. 150. 



Bot. Pbov: — 15. 



Scotland : — Craig Calliach, Ellin. Mev. J. M. Crombie. (1874.) 



" Spores .011 — 14 mm. long, .006 — 7 mm. broad." (Crombie.) 



III. AGYRIUM. Fr. in part, Nyl. 



Thallus scarcely visible. Apothecia oblong or rotundate, epithe- 

 cium plane or convex. Paraphyses distinct. 



1. A. rufuvi, (Pers.) thallus indicated by a whitish spot; 

 apothecia bright-red, rotundate or oblong, pale or convex, prominent, 

 sub-tuberculose ; hypothecium pale ; spores 8, colourless or rufescent, 

 ellipsoid, simple. 



On old posts, &c, rare. 



Stn -.—Stictis rufa, Pers. Obs. Myc. 2. p. 74. (1799.) Agyrium, Fr. S M 2 

 232. Nyl. Scand. 250. 



Fig :— Pers. Obs. Myc. t. 6. f. 6. 



Exs :— Fellm. 206. M. & N. 1096. 



Geog. Distbib : — Scandinavia, Switzerland, France. 



Bot. Pbov:— 6, 7. ..10. ..19. 



Scotland : — Achrosagan, Appin. Bev. J. M. Crombie. 



Ibeland :— Crogham ! Killamey. Messrs. Wright <£• Carroll. Dinis, Killarnev 

 Mr. Carroll. J " 



Wales : — Gaer Ditches ! near Knighton, Radnorshire, Dolgelley ! 



"Spores .011—14 mm. long, .007—9 mm. broad." [Nyl.) Spores .012 mm. 

 long, .C08 mm. broad. 



