Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 105 



parte inferiore basive immersa aut semiimmersa, verrucas 

 formantia O.35 — 0.7 mm latas, nigras, nudas, hemisphaericas 

 aut mastoidcas. Perithecium subglobosum, fuscofuligineum, 

 subintegrum, basi tenuius, vertice convexo aut margine 

 ostiolari leviter prominente, ostiolo parvo. Sporae 8:nae, 

 decolores, murales, cellulis numerosis, Jong. O.027 — 0.033, 

 crass. O.015 — O.ois mm" (in specim. Ponojensi secund. annot. 

 Nyl.). 



Distr. In rupe calcaria ad Orlov (Gubnoj) in Lapponia 

 Ponojensi (A. 0. Kairamo). 



Thallus continuus aut diffractus, raro tenuis, hypothallo in- 

 distincto. Apothecia vertice saepe leviter nitida. Nucleus albidus, 

 parce resinoso-guttulosus, jodo subroseus. Perithecium (in specim. 

 Fennico), lat. 0.4 — 0.3 mm, ostiolo circ. O.040 mm lato, raro albido. 

 Periphyses constipatae, subsimplices, increbre septatae, long. circ. 

 0.030, crass. O.0015 mm. Paraphyses in gelatinam diffluxae, cavi- 

 tates striis parcis indicatae. Asci subclavati aut subventricosi, 

 long. circ. O.070, crass. O.034 mm, membrana gelatinosa, primum 

 crasso. Sporae distichae, ellipsoideae, apicibus rotundatis, mem- 

 brana tenui, haud gelatinosa. Gonidia pleurococcoidea, etiam 

 4-cellulosa et glomerulosa. 



Obs. Pohjblastia intercedens (Nyl.) Lonnr. Fl. 1858 p. 631 (Verru- 

 caria Nyl. Enum. Gen. Lien., 1857, p. 137) secundum specimen a Nyl. 

 citatum {V. muralis Hepp Flecht. Eur. II, 1857, n. 445) peritheciis dimi- 

 diatis, basi albidis, vertice saepe umbilicato-impressis a P. integrascente 

 differt. Ceterum ad „P. intercedentem" Nyl. aliique auctores postea 

 diversas species retulerunt. 



9. P. hyperborea Th. Fr. 



Lich. Arct. (1860) p. 266, Lich. Spitsb. (1867) p. 49. Verrucaria 

 inumbrata Nyl. in Norrl. Fl. Kar. Oneg. II (Medd. Sallsk. F. et Fl. 

 Fenn. I, 1876) p. 39 (haud Nyl. in Fl. 1864 p. 355). Polymastia interce- 

 dens Th. Fr. Polybl. Scand. (1877) p. 20 pr. p. (haud Verrucaria interce- 

 dens Nyl. Enum. Gen. Lich., 1857, p. 137, Exp. Pyrenoc, 1858, p. 33, 

 Lich. Scand., 1861, p. 276). 



Thallus evanescens indistinctusque. Apothecia sat sparsa, 

 primum substrato immersa deindeque emergentia et verrucas 

 formantia 0.3 — O.2 mm latas, nigras, nudas, subhemisphaericas. 

 Perithecium subglobosum, fuscofuligineum, basi anguste albi- 

 dum pallidumve, vertice convexo aut margine ostiolari levi- 



