Acta Societatis pro Fauna et Flora Fennica, 49, N:o 2. 83 



Exs. Zwackh Lich. Exs. (1884) n. 902. Norrl. et Nyl. Herb. 



Lich. Fenn. VIII (1882) n. 396. 



Thallus polyphyllus, squamulosus, squamis crenulatis 

 lobatisque, adpressis adscendentibusve, vulgo demum imbri- 

 catis et e margine proliferis et demum caespites — 4 mm 

 crassos plus minus latos, areolato-diffractos formantibus, 

 superne luridis vel cervino-pallidis aut raro subfuscescenti- 

 bus, subtus nigricantibus, rhizinis destitutus, hypothallo de- 

 mum deficiente. Apothecia thallo immersa, vertice demum 

 leviter prominente et verruculam 0.2— O.15 mm latam, obscu- 

 ratam fuscescentemve formante. Perithecium integre nigri- 

 cans fuscescensve aut tantum apice obscuratum ceterumque 

 pallidum decoloratumque. Gonidia hymenialia subglobosa. 

 Sporae binae, demum obscuratae. 



Distr. In lateribus praeruptis vel declivibus rupium 



graniticarum, quartzosarum et micaceo-schistosarum locis 



apricis, littoralibus aut subirrigatis. Karelia Ladogensis: 



Lahentausta in Kirjavalahti (J. P. Norrlin). Karelia Onegensis: 



Tiudie (A. Kullhem), Pyhaniemi (Norrl.). Kuusamo: Ruskea- 



kallio ad Paanajarvi (Vain.). 



Thallus humidus fere nigricans, squamis primum adpressis, 

 rotundatis, 0.5 — 1 mm latis, demum circ. 2.5 — 0.5 mm longis et 

 1.5 — 0.5 mm latis et crustam caespitemve inferne emorientem et 

 superne prolificationibus accrescentem formantibus, laevigatis, haud 

 pruinosis, subtus glabris, tantum in statu juvenili hypothallo af- 

 fixus. Perithecium globosum, lat. circ. 0.260 mm. Gelatina hyme- 

 nialis jodo violascens. Periphyses sat numerosae, constipatae, 

 long. circ. O.020, crass. O.002 mm. Paraphyses in gelatinam dif- 

 fluxae. Gonidia hymenialia diam. O.003 — O.002 mm aut raro long. 

 O.0035 et crass. O.003 mm, vulgo simplicia, parcius 2-cellulosa (Nyl. 

 etiam 4-cellulosa vidit). Sporae primum decolores, oblongae aut 

 ellipsoideae, murali-divisae, cellulis numerosissimis, „long. O.035 — 

 0.048, crass. O.014 — O.ois mm" sec. Nyl. (long. O.027 — O.044, crass. 

 O.012 — O.022 mm, ut ipse observavi). Stratum corticale superius crass. 

 O.014 — O.020 mm, plectenparenchymaticum, leptodermaticum, cavi- 

 tatibus cellularum O.004 mm latis. Stratum corticale inferius crass. 

 O.014 — O.025 mm, plectenparenchymaticum, leptodermaticum, cavi- 

 tatibus cellularum O.004 — O.009 mm latis. Zona gonidialis plecten- 

 parenchymatica, crassa. Gonidia pleurococcoidea, subglobosa, 

 simplicia lat. O.ooo— O.oos mm, saepe bicellulosa, membrana sat 



