128 E. A. Vainio, Pyrenocarpeae. 



scurata partim limitatus. Apothecia thallo semiimmersa, 

 verrucas formantia conoideo-hemisphaericas, 0.3 — O.35 mm 

 latas, persistenter aut primum diu totas tenuissime thallino- 

 obvelatas cinerascentesque aut cinereo-nigricantes, aut 

 demum parte apicali denudato nigricanteque, margine 

 ostiolari saepe leviter prominente, ostiolo vulgo foveolam 

 O.i — O.15 mm latam formante. Perithecium globosum, in- 

 tegre nigrum aut basi tenuissime nigricans. Sporae elli- 

 psoideae oblongaeve, 1-septatae, long. O.026 — O.033, crass. 

 O.014 — O.oie mm („—0.oi2 mm" sec. annot. Nyl. in herb, suo, 

 n. 6941). 



Distr. Ad saxum gneissaceum prope Porontimajarvi 

 in Kuusamo (F. Silen). 



Gonidia pleurococcoidea, globosa, vulgo diam. O.008 mm. 

 Nucleus jodo violascens. Paraphyses in gelatinam diffluxae. 

 Asci ventricosi. Sporae 8:nae, decolores, apicibus obtusis aut 

 rotundatis, haud constrictae. — Proximum est Thelidio Auruntii 

 (Mass.) Koerb., quod sec. specim. orig. n. 2080 et 2082 et 2077 

 in herb. Nyl. thallo minus evoluto et apotheciis nigricantibus, 

 haud thallino-obvelatis ab eo differt. Th. immersum (Leight.) 

 Mudd sec. Mudd Lich. Brit. Exs. n. 283 apotheciis in fossis 

 calcariis omnino immersis ab his differt. 



8. Th. immersum (Leight.) Mudd 



Man. Brit. Lich. (1861) p. 295, tab. V f. 123; Zschacke Hedwigia 

 LXII, 1920, p. 102; A. Smith Mon. Brit. Lich. II (1911) p. 297 p. p. 

 Verrucaria immersa Leight. Brit. Ang. Lich. (1851) p. 57, tab. XXV f. 2, 

 Lich. Great Brit. 3 ed. (1879) p. 460. Verrucaria Auruntii Nyl. Circa 

 Lich. Armor. (1863) p. 404 (sec. spec. orig. nee Mass. Gen. Lich., 1854, 

 p. 22, nee Symm. Lich., 1855, p. 77). Verr. pyrenophora var. incavaia 

 Nyl. Ad Veg. Hels. Sav. Aland. (Not. Sallsk. F. et Fl. Fenn. 4, 1859) 

 p. 242. V. pyrenophora *V. incavata Nyl. Lich. Scand. (1861) p. 273 (nee 

 Fl. 1881 p. 189, 457, nee Hue Addend, p. 285, nee Th. incavatum Mudd 

 1. c. p. 295, tab. V f. 122). 



Exs. Mudd Lich. Brit. Exs. Ill (1861) n. 283. 



Thallus evanescens, materiae calcariae immixtus, ma- 

 cula obscure cinerascente aut subalbida indicatus, hypo- 

 thallo indistincto. Apothecia fossis substrati calcarii om- 

 nino immersa, vertice nigro, denudato, e substrato haud 



