86 Acta Societatis pro Fauna et Flora fennica. VJI. 



tcnsam, ibi formans. Hypothecium subhymeniale albidum, parte 

 inferiore pallidum. Paraphyses 0,ooi5 millim. crassae, apice haucl 

 incrassatae, gelatinam in KHO turgescentem percurrentes, haud 

 ramosae. Asci eylindrici. Sporae imbricatim monostichae, ob- 

 longae aut ovoideo-oblongae, apicibus rotundatis aut obtusis, ha- 

 lone nullo, ioculis lenticularibus, jodo violaceo-caerulescentes. 



2. Gyrostomum. 



Fr., Syst. Orb. Yeg. (1S25) p. 268; Tuck., Gen. Lick. (1872) p. 140. Syn. 

 North Am. (1882) p. 228; Mali. Arg., Graph. Fee (1887; p. 4 et 52. Gymno- 

 trema NyL, finuni. Gen. Lich. (1S57) p. 119. 



Thallus crustaceus, uniformis, hypothallo aut byphis medul- 

 laribus substrato affixus, rhizinis nullis, strato corticali haud evo- 

 luto, strato medullari stuppeo, toto gonidia continente, ex hyphis 

 contexto tenuibus, leptodermaticis. Gonidia chroolepoidea, cellu- 

 lis minutis, anguloso-subglobosis aut ellipsoideis aut parcius etiam 

 oblongis, saltern prinium concatenatis, filamenta saepe parce 

 ramosa formantibus, demum saepe pro parte etiam liberis, mem- 

 brana sat tenui, flavovirescentia. Apotheda thallo innata, demum 

 emergentia adpressave, orbieularia aut subrotunda, disco aperto, 

 concavo urceolatove, simplice, margine bene evoluto proprio aut 

 duplice cincta. Perithecium integrum aut dimidiatum, fuligineum 

 fuscescensve aut ini'erne pallidum, ex hyphis tenuibus leptoder- 

 maticis conglutinatis formatum, extus denudatum aut amphitJiecio 

 thallino evanescente aut bene evoluto obductum. Paraphyses 

 numerosae, parce ramoso-connexae, apice haud aut vix incras- 

 satae, neque flexuosae, nee spinuloso-verruculosae. Asci mem- 

 brana sat tenui. Sporae 8:nae aut pauciores, oblongae aut fusi- 

 formi-oblongae, murales, demum obscuratae. 



1. G. scyphulifemm (Ach.) Fr., Syst. Orb. Yeg. (1825) p. 

 268; NyL, Lich. Nov.-Gran. (1863) p. 455; NyL, Syn. Lich. Nov. 

 Caled. (1868) p. 39; Mull. Arg., Lich. Beitr. (Fl. 1885) p. 941, 

 Rev. Lich. Meyen. p. 315, Graph. Feean. (1887) p. 52, Tuck., E 

 North Am. (1882) p. 228. Lecidea scyphulifera Ach., Syn. Lich. (1814) 

 p. 27 (hb. Ach.). Gymnotrema atratum (Fee) NyL, Enum. Gr6n. 

 Lich. (1857) p. 119 pr. p. (inns. Paris.). 



Thallus tenuis, albidus. Apothecia vulgo sat approximata, 



