OF GREAT BRITAIN. 287 



brunneo-infuscate ; gelatina hymenea and asci at first blue, then 

 red or vinous-violet with iodine. 



On weathered quartzose stones, rare. 1869. 



Stn :— Nyl. in Mora 1870. p. 35. Crombie in Seem. Journ. Bot. 8. 99. 

 Exs :— Crombie 89. 

 Geog. Distrib:— Europe. 

 Bot. Peov :— 15. 



Scotland : - Summit of Morrone ; Braemar ! Rev. J. M. Crombie. (1869. ) 

 Apparently very near to L. segregans. " Spores .010—18 mm. long, .004 — 7 

 mm. broad." (Nyl) Spores .019— .02 mm. long, .0055 mm. broad. 



126. L. commacidans, Nyl. fuscous-Mack or nigricant, thin, 

 opake, sub-areolate, areolae depressed, generally dispersed, indeter- 

 minate; apothecia black, somewhat convex, with scarcely any 

 margin, concolorous within ; hypothecium thichish, rubricoso-fuscous, 

 this colour passing upwards into the thalamium; epithecium 

 nigricant ; spores 8, colourless, oblong, or linear-oblong, simple ; 

 paraphyses indistinct ; gelatina hymenea cserulescent with iodine. 



On felspathic boulders, rare. 1868. 



" Approaching L. Kajardta, in which the spores are different and the thala- 

 mium not tinged with red, but more allied to L. dwpansa, Nyl. Spermatia 

 cylindrical straight. Spores 0.008—0.011 mm. long, 0.003—4 mm. broad." Nyl. 

 Hypothecium has the same reddish tinge which is produced by K on the 

 hypothecium of Lecanora snbfusca var. coilocarpa, and this colour passes without 

 distinguishable tint into the thalamium, 



Stn :— Nyl. in Flora 1868. p. 476. Crombie En. 93. 



Geog. Distrib :— Europe. 



Bot. Peov :— 15. 



Scotland : — Morrone ! Braemar. Rev. J. M. Crombie. 



Spores .01 — .011 mm. long, .003—4 mm. broad. 



127. L. amphotera, Leight. white, tartareous, areolato-diffract, 

 areolae of compound clustered convex granules, (K yellow C yellow) ■ 

 apothecia fuscous, clustered or conglomerate, innate, prominent, large 

 immarginate ; hypothecium fuscous, thickish ; paraphyses crowded 

 but distinct ; spores 8, colourless, lineari-oblong, simple. 



On alpine rocks, rare. 1870. 



Bot. Peov:— 7...15. 



Scotland : — Hill of Ardo near Aberdeen. Rev. J. M. Crombie. (1870.) 



Wales :— Conway ! 



The thallus of this has the general appearance of that of PUo-phoron fibula 

 with its fuscous cephalodia, and the spores resemble those of Lecidea lapicida 

 from which the nature of the thallus and the different hypothecium distinguish 

 it. Spores .0175 mm. long, .005 mm, broad. 



128. L. dealbatula, Nyl. white, thin, rimose or scatteredly con- 

 vexo-subareolate, unequal, (K — C — ) ; apothecia black, small, pro- 

 minent, margined, umbonate or at length subgyrose in the centre, 

 concolorous within ; spores 8, colourless, ellipsoid, simple, minute ; 

 epithecium and hypothecium nigro-fuscous ; paraphyses moderate, 

 distinct but coherent ; gelatina hymenea I intensely-bluish. 



On schistose and hard-grained rocks, rare. 1874. 



Stn :— Nyl. in Elora 1874. p. 315. 



Bot. Prov:-7...15...26. 



Scotland ; — Stronaclachan, Killin. Rev. J. M. Crombie. (1877.) 



Ireland : — Kylemore Castle ! co. Galway. Mr. Larbalestier, 



