Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 175 



„Paraphyses sat graciles, confertae. Sporae 8:nae, decolores. 

 Gonidia magna, diam. O.026 — O.032 mm" (Nyl. 1. c). In specimine 

 a Norrl. collecto gonidia cellulis anguloso-subglobosis aut sub- 

 ellipsoideis, O.016 — O.024 mm crassis, concatenatis, membrana in- 

 crassata, ad Trentepohliam iolithum (L.) Wallr. pertinentia. Apo- 

 thecia sat crebra aut sparsa. 



3. P. nigratula (Nyl.) Vain. 



Verrucaria nigratula Nyl. Fl. 1875 p. 105; Norrl. Symb. Fl. Ladog.- 

 Karel. (1878) p. 33; Vain. Fl. Tav. Or. (1878) p. 121, Adj. Lich. Lapp. II 

 (1883) p. 185; Hue Addend. II (1888) p. 293. 



Thallus tenuis, verruculoso-rugulosus, subdispersus, 

 muscos destructos inaequaliter obducens, olivaceus aut 

 olivaceo-cinerascens aut varie obscuratus, opacus, hypo- 

 thallo indistincto. Apothecia sparsa aut sat crebra, im- 

 mersa, dein mox emergentia elevataque, verrucas formantia 

 subhemisphaericas, circ. 0.4 mm latas, basin versus sensim 

 dilatatas, amphithecio thallino, thallo concolore aut ob- 

 scuriore, sat inaequali, parte inferiore plus minus late 

 tenuiter obvelatas, vertice denudato, nigro, opaco, margine 

 ostiolari haud aut sat praerupte leviter prominente et 

 modice incrassato, ostiolo modice dilatato, saepe foveolam 

 formante. Perithecium globosum, integrum, parte exteriore 

 fuscoviolascenti-fuligineum (KHO cyanescens), strato inte- 

 riore lutescente decoloreve, KHO rubescente. Sporae fusi- 

 formes, apicibus vulgo acutis, 5 — 3-septatae, loculis sat 

 aequalibus, membrana sat tenui, haud gelatinosa, long. 

 O.020 — O.026, crass. O.006 — O.oos mm. Gonidia a Trentepohlia 

 iolitho praedita. 



Distr. Supra muscos destructos in lateribus rupium 



collecta. Karelia Ladogensis: Variskallio in Kirjavalaks 



(J. P. Norrlin). Tavastia austr.: Savijarvi in Evo (Norrl.), 



Piilila in Korpilahti (Vain.). Karelia bor. : Hiidenportti in 



Nurmes (Vain.). 



Nucleus albidus, jodo non reagens. Paraphyses numerosae, 

 simplices. Sporae variabiles. Perithecium „in lamina tenui parte 

 externa apparet violaceo-nigrum, parte interna incolore KHO 

 ochraceo-tincta, strato externo crass. O.025 mm, strato interno 

 fere O.040 mm" (secundum annot. Nyl. in bibl. sua, 1. c). Gonidia 



