Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 157 



aut sparsa, verrucas formantia 0.3 — 0.7 mm latas, irregulari- 

 ter subdepresso-hemisphaericas aut late depresseque sub- 

 conoideas, basin versus valde sensim dilatatas, cinerascentes 

 aut glaucescenti-cinereas, verticem versus sine limite distincto 

 obscurius cinerascentes vel subnigricantes, margine ostiolari 

 saepe intensius obscurato nigricanteve, haud aut leviter 

 prominente aut impresso, ostiolo parvo aut irregulariter 

 dilatato, interdum foveolato. Perithecium subhemisphaeri- 

 cum, vulgo circ. O.440 — O.350 mm latum, basi applanatum, 

 superne cinereo-pallescens aut dilute cinereo-fuscescens, 

 dimidiatum, amphithecio thallino obductum, vertice anguste 

 aut interdum late denudatum. Paraphyses numerosae, 

 ramoso-connexae. Asci variabiles. Sporae 8:nae, murales, 

 „long. O.019 — 0.o4o, crass. O.011— O.018 mm" (Nyl. Lich. Paris 

 p. 125), in specim. Fenn. sec. annot. Nyl. „long. O.020 — O.035, 

 crass. O.008 — O.ou mm". Gonidia pleurococcoidea. 



Distr. Ad corticem Sorbi aucupariae in Koski Tavastiae 

 austr. (J. P. Norrlin). 



Specimen Fennicum a Nyl. nominatum est var. griseella Nyl. 

 (Exp. Pyrenoc. p. 63, V. modesta v. grisella Nyl. Lich. Paris 

 p. 125), thallo cinerascente dignota. Gonidia simplicia, diam. 

 O.008 — O.ou mm. Ostiolum circ. O.030 mm. Nucleus haud resinoso- 

 guttulosus, jodo non reagens, metaplasmate rubescente. Para- 

 physes crass. O.001 — O.0008 mm. Asci subcylindrici aut oblongi 

 aut ventricosi aut clavati, long. O.090 — O.100, crass. O.018 — O.022 mm, 

 in apice membrana modice incrassata. Sporae distichae, decolores, 

 oblongae, apicibus rotundatis, cellulis numerosis, saepe in 9 serie- 

 bus transversis, jodo non reagentes, membrana tenui, haud gela- 

 tinosa. Thallus et apothecia sat opaca. — Conidia a Nyl. (1. c. 

 cet.) in hac specie indicantur „filiformia, arcuata, long. O.018 — 

 O.023, crass, vix O.001 mm". — Migroglaena Wallrothiana f. septen- 

 trionalis Th. Fr. (Fl. 1867 p. 185) secund. annot. Nylandri in 

 bibl. sua hue pertinet. 



Stirps 2. Weitenwebera (Koerb.) Vain. 



Weitenwebera Koerb. Par. Lich. Germ. 4 Lief. (1863) p. 327. 

 Microglaena ** Weitenwebera Jatta Fl. It. Crypt. Lich. p. 846. 



Perithecium nudum, amphithecio thallino nullo ob- 

 ductum, aut inferne thallo anguste immersum. 



