220 E. A. Vainio. Lecideales. 



latis, membranis sat crassis aut partim sat tenuibus, subchon- 

 droideum et sat variabile, inferne partim distincte chondroideum 

 et irregfulariter contextum. Perithecium ex hyphis formatum 

 radiantibus, O.0025 mm crassis, modice pachydermaticis, congluti- 

 natis, increbre septatis, cavitatibus O.0015 mm latis, decoloratum 

 aut pallidum aut (in f. fumosa) partim extus dilute rufescens. 

 Paraphyses arete cohaerentes, partim simplices aut basim versus 

 parce et ambitum hymenii versus abundantius ramoso-connexae, 

 gelatinam in KHO turgescentem dissolutamve percurrentes, crass. 

 0.001 mm, apice baud incrassatae. Asci paraphysibus multo bre- 

 viores, long. circ. O.040, crass. O.014 mm, membrana in apice valde 

 incrassata. Sporae 8:nae, aciculares, spiraliter contortae aut raro 

 in eodem apothecio subrectae, apicibus acutis, 3-septatae, long. 

 0.014 — 0.024, crass. O.ooi — O.0015 mm. Gonidia pleurococcoidea, 

 simplicia diam. O.008 — O.012 mm, saepe etiam 2-cellulosa. 



F. pallescens Vain. Apothecia pallida testaceave. — Loco supra 

 indicato lecta (K. Linkola). 



F. fumosa Vain. Apothecia superne nigricantia (simplicia). 

 Thallus partim obscurius cinereo-virescens. — In f. pallescentem sine 

 limite sensim transit, in eadem rupe, in parte minus umbrosa, cum 

 ea crescens. 



Subg. II. Arthrorhaphis (Th. Fr.) Vain. 



Arthrorhaphis Th. Fr. Lich. Arct. (1860) p. 203, Gen. Heterol. (1861) 

 p. 87, Lich. Scand. II (1874) p. 343. Raphiospora Mass. Ale. Gen. Lich. 

 (1853) p. 11; Koerb. Syst. Lich. Germ. (1855) p. 267. 



Mycobacidia defectu gonidiorum ab Arthrorhaphide differt et in- 

 terdum hymenio jodo caerulescente instructa est (conf. Vain. Lich. Ins. 

 Philipp. Ill, 1921, p. 74). 



Thallus sorediosus aut crustaceus aut evanescens. 

 Sporae aciculares aut bacillares, vulgo 3 — pluri-septatae, 

 decolores. Hymenium jodo non reagens. Perithecium sub- 

 carbonaceum, ex hyphis sat irregulariter contextis, conglu- 

 tinatis formatum. Gonidia pleurococcoidea. Subgenus ad 

 Fungos accedens. 



Inter Acanthaceas exstat homonymon et anterius genus 

 Rhaphidospora Nees (1832) in forma rectiore. Rhaphidospora 

 Ces. et de Not. est Ophiobolus Riess (conf. Sacc. Syll. Fung. II 

 p. 337). — Arthrorhaphis a Th. Fries (Lich. Scand. II p. 343) ad 

 Fungos erronee relegatur, et apotheciis jodo non reagentibus lis 

 est proxima. E Discomycete fertili et e thallo Sphyridii (Baeo- 



