138 E. A. Vainio, Pyrenocarpeae. 



mantia hemisphaericas, nigras, nudas, opacas. Perithecium 

 fusconigrum, globosum, lat. O.oso— O.130 mm, immersum et 

 demum semiimmersum, margine ostiolari haud prominente, 

 ostiolo O.020 mm lato, typhis e basi excrescentibus fusco- 

 nigris, O.003 — O.005 mm crassis, crebre septatis, haud con- 

 strictis. Asci ovoideo-oblongi, in apice membrana modice 

 aut primum bene incrassata. Paraphyses grumoso-obsoletae. 

 Sporae distichae, ovoideo-oblongae, apicibus obtusis aut 

 altero apice rotundato, 1-septatae, long. O.013 — O.ou, crass. 

 O.005 mm, membrana sat tenui. 



Distr. In thallo crasso albido lichenis saxicolae gonidia 

 pleurococcoidea continentis, nee KHO nee jodo reagentis 

 (forsan Diploschistis scruposi) in rupe prope Helsingforsiam 

 (Vain.). 



Nucleus jodo non reagens, metaplasmate ascorum rube- 

 scente. Asci long-, circ. O.035, crass. O.014 mm. Sporae 8:nae, 

 loculis aeque longis, haud aut leviter constrictae, haud gelatinoso- 

 indutae, decolores. 



Div. 2. Paraphysibus valgo instructae. Periphyses raro 

 evolutae. 



Subtrib. 9. Pyrenuleae (Mull. Arg.) Vain. 



Thallus crustaceus, gonidia continens, aut e mycelio 

 gonidiis destituto constans. Apothecia recta, simplicia aut 

 confluentia, ostiolo mediano instructa. Paraphyses bene 

 evolutae. Sporae ellipsoideae aut oblongae aut fusiformes 

 aut ovoideae, obscuratae, septis 1 — pluribus transversim 

 divisae. 



Pyrenula Fee 



Ess. Crypt. Ecorc. Suppl. (1837) p. 76 em. (haud Ach. Lich. Univ., 

 1810, p. 314); Mass. Ric. Lich. Crost. (1852) p. 162 (em.); Vain. Etud. 

 Lich. Bres. II p. 118. 



Thallus crustaceus, uniformis. Gonidia a Trentcpohlia praedita. 

 Perithecium rectum, fuligineum. Paraphyses simplices aut raro ramoso- 

 connexae. Sporae 8:nae aut raro 4:nae, obscuratae, ellipsoideae oblon- 

 gaeve aut fusiformes, transversim 3— 6-septatac, endosporio incrassato 

 et loculis lenticularibus. 



