Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 167 



strato tenui substrati velatum, ostiolo O.030 mm lato. Nucleus 

 albidus, haud resinoso-guttulosus, jodo non reagens, metaplasmate 

 rubescente. Paraphyses numerosae, crass. O.0015 mm, simplices 

 aut raro parce ramosae, haud connexae, increbre septatae. Asci 

 oblongi aut raro subcylindrici, long. 0.060 — O.100, crass. O.016 — 

 O.020 mm, in apice membrana modice incrassata. Sporae 8:nae, 

 distichae, decolores, ellipsoideae, apicibus rotundatis, submurales, 

 septis transversis 3 — 5, loculis leviter inaequalibus, mediis paullo 

 majoribus, saepe sat diu simplicibus, membrana tenui, haud gela- 

 tinosa. Sec. Lahm (Zusamm. Westf. Flecht., 1885, p. 132) stylo- 

 sporae (macroconidia) fuscae, dactyloideae, 3-septatae, long. 

 O.009 — O.012, crass. O.003 — O.001 mm, apicibus obtusis (in pycnidi- 

 is minutis, basidiis brevibus). — In specimine in Kola a Fellm. 

 lecto et a Nyl. determinato descriptoque perithecium aeruginosum, 

 cellulis substrati tenuiter velatum aut denudatum, ostiolo O.010 mm 

 lato, hyphis excrescentibus aeruginosis et partim fuscescentibus, 

 O.003 — O.005 mm crassis, crebre aut partim increbre constricte 

 articulatis. Paraphyses parcae aut sat numerosae, simplices, 

 crass. O.0008 mm. Asci suboblongi aut raro cylindrici, long. 

 O.070, crass. O.012 — O.014 mm, membrana modice incrassata. 

 Sporae 8:nae, distichae aut raro monostichae, decolores, fusi- 

 formes, apicibus acutis aut sat obtusis, ad septa leviter con- 

 strictae, loculis 1 — 2 vulgo paullo longioribus, membrana tenui, 

 haud geiatinosa, sec. Nyl. „3 — 5-septatae, inter septa nonnihil vel 

 obsolete longitudinali sensu divisae, long. O.ois — O.021, crass. 

 O.007 — O.008 mm". In apothecio a me examinato sporae haud 

 omnino maturae, septis transversis 3 aut raro 4, in sensu longi- 

 tudinali tantum protoplasma nonnullorum loculorum divisum. In 

 hoc statu difficillime a Metasphaeria aeruginella distinguitur. 



Obs. Mijcoglaena betularia (Nyl.) Vain. (Verrucaria Nyl. Fl. 1880 

 p. 392, Fl. 1881 p. 189, Lich. Paris, 1896, p. 126) vix nisi perithecio fusco 

 a M. fallaciosa (Stizenb.) differt. Sec. herb. Nyl. perithecium lat. O.340 — 

 O.300 ( — 0.2 sec. Nyl. ), saepius oblonge obscure circummaculatum, ostiolo 

 O.030 mm lato. Paraphyses simplices, crass. O.0015 mm, increbre septatae. 

 Asci cylindrici, long. O.070 — 0.084, crass. O.ou — O.020 mm, in apice membrana 

 modice incrassata. Sporae 8:nae, distichae, decolores, murales, ellipsoi- 

 deae aut fusiformes, apicibus obtusis aut rotundatis, septis transversis 

 3 — 5, „long. O.012 — O.ois, crass. O.006— O.oos mm". Conidia „recta, long. O.006 — 

 O.008, crass. O.0007 mm" (Nyl. Lich. Paris p. 126). Supra corticem Betulae 

 in sylva Fontisbellaquea (Nyl.). Etiam in Fennia inquirenda. 



Subtrib. 11. Hyalophragmiae (Sacc.) Vain. 

 Thallus crustaceus, gonidia continens, aut e mycelio 



