222 Acta Societatis pro Fauna et Flora fennica, VII. 



tis aut rarius acutiusculis, loculis cylindricis, fere aeque longis 

 aut duobus medianis paullo longioribus, pariete saepe gelatinoso- 

 incrassato. 



3. P. nucula Ach., Syn. Lich. (1814) p. 112; Mtill. Arg., 

 Lich. Beitr. (Fl. 1883) n. 649, Pyrenoc. Cub. (1885) p. 400, Pyr. 

 Feean. (1888) p. 22. Verrucaria Nyl., Exp. Pyrenoc. (1858) p. 40, 

 Lich. Nov.-Gran. (1863) p. 488, Syn. Nov. Cal. (1868) p. 85. 



Thallus sat tenuis aut crassitudine mediocris, leviter inae- 

 qualis aut verruculosus, glaucescens aut cinereo- vel olivaceo- 

 vel albido-glaucescens, subopacus. Excipulum verrucam 0,8—0,4 

 millim. latam, demum depresso-subglobosam, aut hemisphaericam, 

 basi demum constrictam, aut abruptam, vertice demum saepe 

 anguste umbilicato-impressam formans, amphithecio thallino, thallo 

 concolore (aut apice anguste rufescente) omnino obductum aut 

 apice impresso angustissime denudato, perithecio pallido. Sporae 

 8:nae, l'usiformes, vulgo 7-septatae, (raro pro parte 9-septatae), 

 long. circ. 0,048— 0,060, crass. 0,008— 0,oi2 [„— 0,oi5 u ] millim., 

 cellulis vulgo fere aeque longis. 



Ad cortices vetustos arborum prope Sitio, n. 1152, et La- 

 fayette, n. 331 (1000 metr. s. m.), et in Carassa (1400 metr. s. 

 m.), n. 1375, in civ. Minarum. — Hypothallus indistinctus. Go- 

 nidia chroolepoidea, circ 0,oos— 0,0 o 6 millim. crassa, membrana 

 sat tenui aut crassiuscula. Amphithecium gonidia continens. Pe- 

 rithecium in vertice extus testaceum, ceterum pallidum, KHO ru- 

 fescens. Nucleus albidus, jodo haud reagens, circ. 0,3 2 millim. 

 latus. Paraphyses 0,ooi millim. crassae, simplices aut nonnullae 

 furcatae, haud connexae. Asci oblongi. Sporae decolores, api- 

 cibus acutis aut obtusiusculis aut raro obtusis, loculis cylindricis, 

 pariete vulgo tenui, aut (in eoclem apothecio) gelatinoso-in- 

 crassato. 



4. P. desquamescens Fee, Ess. Crypt. Ecorc. Suppl. (1837) 



p. 75; Mass., Pic. Lich. Crost. (1852) p. 192 pr. p.; Mtill. Arg., 

 Pyr. Feean. (1888J p. 23. Verrucaria Nyl., Exp. Pyrenoc. (1858) 

 p. 39 pr. p. (excl. speciin. in mus. Paris, asservatis). 



Thallus sat tenuis aut crassitudine mediocris, sat laeviga- 

 ta, glaucovirescens, nitidiusculus. Excipulum verrucam 1 — 0,4 

 millim latam, hemisphaericam, basi sensim in thallum abeuntem 

 formans, amphithecio thallino, thallo concolore maxima parte ob- 

 ductum, vertice sat late aut sat anguste denudato, pallido aut ru- 



