84 Acta Societatis pro Fauna et Flora fenniea. VII. 



ovoideo-oblongae, apicibus rotundatis aut obtusis, halone nullo, 

 loculis lenticularibus, jodo violaceo-caerulescentes, long. 0,013 — 

 0,oi8 ( — O.020), crass. 0,oot — 0,oos millim. 



11. Th. leucotrema Nyl., Enuni. Gen. Lich. (1857) p. 118 

 (mus. Paris.). 



TJiallus vulgo hypophloeodes, macula glaucescente aut stra- 

 mineo- vel partim olivaceo-glaucescente opaca indicatus. Exi- 

 pulum verrucam leviter elevatam vel fere hemisphaericam, 0,5 — 1 

 millim. latam, basin versus sensim dilatatam formans, ostiolo de- 

 mum sat lato (circ. 0,4—0,2 millim.), saepe irregulari, margine 

 ostiolari saepe irregulariter fisso aut pro parte subintegro. Apo- 

 tJiecia increbra, disco sat lato, nigricanti-caesio-pruinoso. Peri- 

 thecium dimidiatum, annulare, fusco-nigricans. Sporae 8:nae, de- 

 colores, 5 — 4 (raro 6)-septatae, long. 0,013 — 0,020, crass. O.005 

 — 0,0 7 millim. 



Ad corticem arborum prope Lafayette (1000 metr. s. m.) in 

 civ. Minarum, n. 245, 312, 348. — TJiallus interdum substratum 

 obtegens, at vulgo substrato immixtum. Gonidia cellulis substrati 

 immixta, chroolepoidea, 0,012 — 0,005 millim. crassa, membrana 

 sat tenui. AmpMtheciwn fragmenta substrati continens. Peri- 

 thecium basi fere deficiens aut tenue et albidum pallidumve aut 

 parte inferiore anguste fusconigricans, in medio hymenii colu- 

 mellam fusconigram formans. Nucleus circ. 0,8 4 — 0,7 2 millim. 

 latus. Hymenium circ. 0,06 0— 0,uo millim. crassum. Paraphy- 

 ses 0,ooi millim. crassae, apice haud incrassatae, gelatinam in 

 KHO turgescentem laxamque percurrentes, baud ramosae. Asci 

 subcylindrici aut clavati, circ. 0,012— 0,o 10 millim. crassi. Sporae 

 distichae aut imbricatim monostichae, oblongae aut ovoideo- vel 

 fusiformi-oblongae, apicibus rotundatis aut obtusis, halone nullo. 

 loculis lenticularibus, jodo violaceo-caerulescentes. 



Huic valde affine est Th. schizostomum Krempelh. (Fl. 1876 p, 222 

 quod vix nisi thallo substratum obtegente mediocri nitido ab eo differt 

 Warm.). 



12. Th. album (Fee) Nyl, Syn. Lich. Nov. Cal. (1868; p. 

 35. Myriotrema album Fee, Ess. Lich. Ecorc. (1824) p. 104, tab. 25 

 fig. 2. Ocellularia alba Mull. Arg., Graph. Feean. (1887) p. 6. Thc- 

 lotrema myriotrema Nyl., Lich. Exot. (1859) p. 221 (ex ipso). Th. 

 viridialbum Krempelh., Fl. 1870 p. 221 (hb. Warm.). 



Thallus sat tenuis aut mediocris, sat laevigatas, stramineo- 



