Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 139 



Apothecia simplicia [in subg. Eupyrenula Vain.] aut peritheciis 

 confluentia et pseudostromata formantia [in subg. Melanotheca (Fee) 

 Vain.]. Sporpe raro 1-septatae. Conidia, quantum cognita, filiformia, 

 tenuissima, curvata aut leviter arcuata. Gonidia ad Trentepohliam 

 umbrinam pertinentia. 



P. nitida (Weig.) Ach. 



Thallus macula subpallescente indicatus, hypophloeodes. Apo- 

 thecia verrucas formantia, circ. 1— O.e mm latas, hemisphaericas, amphi- 

 thecio thallino obductas, vertice demum denudato. Perithecium hemi- 

 sphaerico- aut depresso-subglobosum, integrum, basi tenue. Paraphyses 

 simplices. Sporae 8:nae, fusiformes aut fusiformi-oblongae, apicibus 

 obtusis, 3-septatae, loculis lenticularibus, long. circ. O.on— O.026, crass. 

 O.007-O.010 mm. Conidia filiformia, arcuata, long. O.020— O.025, crass. O.0005 

 mm (Nyl. Lich. Paris p. 128). 



Exs. Malme Lich. Suec. Exs. II (1897) n. 50. 



Distr. Praecipue ad corticem Fagi crescens, in Suecia meridio- 

 nali obvenit, adhuc e Nericia citata (Hellb. Ner. Laffl. p. 125), at in 

 Fennia hucusque collecta non est. 



1. Mycopyrenula Vain. 



Genus gonidiis destitutum, ad fungos pertinens. Sporae 

 8:nae, ' subfusiformes, obscuratae, 3-septatae, loculis lenticu- 

 laribus, endosporio incrassato. Paraphyses simplices. Tantum 

 defecto gonidiorum a Pyrenula Fee et loculis sporarum lenti- 

 cularibus a Leptosphaeria Ces. et de Not. differt. 



1. M. coryli (Mass.) Vain. 



Pyrenula coryli Mass. Ric. Lich. Crost. (1852) p. 164; Koerb. Par. 

 Lich. Germ. 4 Lief. (1863) p. 334; Arn. Lich. Frank. Jur. (PL 1885) p. 

 269; Jatta Fl. It. Crypt. Ill p. 901. Verrucaria coryli Nyl. Addit. Fl. 

 Crypt. Chil. (1855) p. 174 (Exp. Pyrenoc, 1858, p. 47), Lich. Paris (1896) 

 p. 128; Norrl. Bidr. Sydostr. Tav. Fl. (1870) p. 195. 



Exs. Zwackh Lich. Exs. (1853) n. 216 a, bis. — Rabenh. Lich. 

 Eur. IV (1856) n. 85. — Hepp Flecht. Eur. II (1857) n. 465. - Norrl. 

 et Nyl. Herb. Lich. Fenn. VIII (1882) n. 394. - - Arn. Lich. Exs. (1885) 

 n. 1135. 



Thallus macula cinerascente pallidave indicatus. Apo- 

 thecia sparsa, verrucas formantia hemisphaericas aut sub- 

 ellipsoideo-hemisphaericas, O.25— O.35 mm latas, nigricantes, 

 nitidas, margine ostiolari haud aut leviter prominente, ostiolo 



