44 E. A. Vainio, Pyrenocarpeae. 



8. V. melaenella Vain. (n. sp.). 



Thallus tenuis, subcontinuus aut dispersus, verruculoso- 

 inaequalis, superne nigricans, hypothallo indistincto. Apo- 

 thecia crebra aut sat crebra, semiimmersa vel leviter emer- 

 gentia, verrucas formantia depressas vel fere hemisphaericas, 

 nigras, nudas. Perithecium globosum, lat. circ. 0.26 mm, 

 subfuscofuligineum, integrum, vertice convexo, margine 

 ostiolari nee impresso nee prominente, ostiolo minutissimo, 

 baud foveolato. Sporae ellipsoideae oblongaeve, long. 

 0.oi6 — O.022 (sec. Ras. „ — O.029"), crass. O.007 — O.010 mm. 



Distr. Ad terrain arenosam calcariam nudam. Ostro- 

 botnia bor.: Tiurasenkrunni in par. Simo (V. Rasanen). 



Facie externa Collemopsim in memoriam revocans et proxime 

 affinis V. geomelaenae Anzi (Symb. Lich. Ital. p. 24), quae thallo 

 submucoso dissimilique ab ea differt. Comparabilis V. terrestis 

 (Arn.) perithecio dimidiato et thallo cinerascente ab his distin- 

 guitur. — - In V. melaenella thallus superne plectenparenchymati- 

 cus. Perithecium plectenparenchymaticum, cellulis angulosis, circ. 

 0.008—0.006 mm latis, in basi stratum simplicem, in parte superiore 

 strata plura formantibus. Nucleus jodo dilute rubescens. Periphyses 

 long. O.016 — O.040, crass. O.003 — O.004 mm, increbre septatae, mem- 

 brana tenui. Paraphyses in gelatinam diffluxae, striis oblongis, 

 seriatis, indicatae. Asci subclavati aut subventricosi, long. O.040— 

 0.080, crass. O.oie — O.020 mm, membrana gelatinosa. Sporae 8:nae, 

 distichae, decolores, simplices, apicibus rotundatis aut obtusis. 

 Gonidia pleurococcoidea, vulgo glomerulosa, cellulis globosis, diam. 

 O.ooe — O.009 mm. 



9. V. grossa Nyl. 



in Nyl. et Sael. Herb. Mus. Fenn. (1859) p. 93, 111; Nyl. Lich. 

 Scand. 1I86I1 p. 270; Th. Fr. Lich. Arct (1860) p. 271; Stizenb. Ind. 

 Lich. Hyperb. (1876) p. 52. 



Thallus tenuis, verruculosus aut minute areolatus, areolis 

 O.2 — O.i mm latis, dispersis aut subcontiguis, planis aut leviter 

 convexis, albidis aut cinerascentibus, aut evanescens, hypo- 

 thallo indistincto. Apothecia dispersa, verrucas formantia 

 mastoideas conoideasve, 0.4 — 0.- mm latas, amphithecio thai- 

 lino tenui cinerascente aut obscure cinereo obductas, vertice 

 plus minusve late denudato nigroque. Perithecium fusco- 



