292 THE LICHEN-FLORA 



138. L. atrofuscescens, Nyl. cinereo-nigricant or fusco-nigrescent, 

 deplanate, areolato-diffract, svb-opahe, areolae plane or flat ; hypo- 

 thallus black, here and there visible ; apothecia black, actuate, 

 plane, at length somewhat convex, margined, moderate, often 

 sub-angulose, nearly colourless within; hypothecium colourless; 

 epithecium fuscescent ; spores 8, colourless, ellipsoid, simple ; 

 paraphyses slender, sub-irregular ; gelatina hymenea cserulescent, 

 then partly vinoso-rubescent with iodine. 



On micaceo-schistose rocks, rare. 1864. 



Stn :— NyL in Flora 1866. p. 371. Crombie En. 83. 



Geog. Distktb :— Europe. 



Bot. Peov : — 15. 



Scotland : — Lower slopes of Ben Lawers ! Mr. Carroll. (1864). 



Intermediate between L. fuscoatra and tenebrosa, but distinguished by the 

 larger spores and other characters. "Spores .018—20 mm. long, .009— .011 

 mm. broad." {Nyl.) 



139. L. lithophiliza, Nyl. cinerascent, firm, unequally deplanate, 

 areolato-difract or areolato-rimose, thin, rhagadiose, (K yellow) ; 

 apothecia brown-black, innate, plane or convex, immarginate, 

 white internally, bounded beneath with a thin black line ; spores 8, 

 colourless, oblong, simple ; paraphyses moderate, lurido-fuscescent 

 at the apices ; hypothecium with the middle stratum chalky- 

 white, opake (not hyaline), the lower conceptacular stratum thin 

 black ; gelatina hymenea casrulescent with iodine. 



On micaceo-schistose maritime rocks, rare. 1868. 



Syn :— NyL in Flora 1868. p. 473. Crombie En. 66. 



Geog. Disinn? : — Europe. 



Bot. Pbov:— 7...15. 



Scotland : — Portlethen, Kincardine. Bev. J. M. Crombie. 



Wales : — Dolgelley. Dr. Soil. 



Distinct from L. lithopliila and systematically near L. phceopSj. "Spores 

 .009— .017 mm. long, .0035— .0045 mm. broad." {Nyl.) T. M. Fries Lich. 

 Scand. 497. considers this to be a form of L. ItthophUa. (Ach.) 



140. L. interludens, NyL whitish or cinereous-white, thin, rimu- 

 loso-areolate, areola plane, minutely wrinkled, nigro-limitate, (K pale 

 tawny C — ) ; apothecia black, superficial, sessile, rather large, 

 somewhat plano-convex, immarginate or with a very thin white 

 ihalline margin, internally colourless ; paraphyses slender, distinct, 

 clavate and fuscous at the apices ; spores 8, colourless, ellipsoid, 

 simple ; gelatina hymenea blue, afterwards the entire thecas 

 vinous or violet-red. 



On calcareous alpine rocks, rare. 1869. 



Syn :— NyL in Flora 1870. p. 33. Crombie in Seem. Journ. Bot. 8. 98. 



Geog. Disteib :— Europe. 



Bot. Pbov : — 15. 



Scotland :— Morrone ! Braemar. Rev. J. M. Crombie. (1869.) 



Externally similar to L. mollis, which however has the areola; minutely albo- 

 verrucose ; and differs from L. Kochiana, which has a mouse-coloured thallus 

 and innate apothecia. " Spores .010—12 mm. long, .006— 8mm. broad." {Nyl.) 



141. L. nigrificans, Nyl. blackish, opake, thin, rugulose, areolato- 

 rimose, areola flat ; apothecia black, plane, subprominent, marginate, 

 whitish within ; hypothecium colourless ; epithecium greenish- 



