— 183 — 



obovoideo-cylindricae, utrinque obtusae, medio paullo constrictae, 

 2-loeulares, loculùs superior paullo longior et leviter latior. — 

 Subsimilis est A. leucochloraeM'ùW. Arg. ex America septentr., sed 

 sporae multo longiores et ambitu graciles. — Gorticola ad Para- 

 guari. 



235. Artiiopyrenia (s. Mesopyrenia) effugiensMùII. Arg.; thal- 

 lus maculam brunneo-fuseam v. nigrescentem laevem et margine 

 effusam formans; apothecia 1/1 Omintantum lata, diu thallino-vé'lata, 

 demum parte superiore nuda et paullo majora, hemisphaerica, 

 indistincte ostiolata ; perithecium subtus undique deficiens, basi sub- 

 patens, fusco-nigrum ; paraphvses perexiguae, irregulares et con- 

 nexae; sporae in ascis obovoideis snperne pachydermeis 8-nae, 

 14-17 fi longae et 3 1/2— i /j latae, subcylindricae, snperne paullo 

 latiores, graciles, biloculares — Facile praetervidenda, oculis 

 nudis vix nisi colore maculae thallinae indicata, apothecia perpu- 

 silla et paucisexceptis thallino-vestita. Prope africanam.l. receptam 

 Miill. Arg. locanda est. — Gorticola in Paraguay, inter alios Liche- 

 nes parce lecta. 



23G. Artiiopyrenia (*. Polymeridium) puxctuliformis Miill. 

 Arg.; thallus macula pallescente indicatus; apothecia 1 3-l/4mm 

 lata, hemisphaerica, sublaevia, nigra, nuda, vertice minutissime 

 ostiolata; perithecium dimidiatum, basi subpatens; paraphvses valde 

 lencllae et irregulares; asci ovoidei, snperne angustiores, 8-spori; 

 sporae 25-30 ^ longae et 7-8 a latae, fusiformes, utrinque obtusae, 

 O-loculares, loculi subaequales. — ■ Prope montevidensem A. myco- 

 poroidem Mùll. Arg. locanda. — In ramulis Myrtaceae cujusdam 

 in Paraguay. 



237. Polyblastia lactea Mass. Sched. crit. n° 143, asci 4-5-6-8- 

 spori. — Gorticola in Paraguay. 



238. Verrucaria leioplacella Miill. Arg.; thallus tenuissimus, 



2-3 



laevigatus, obscure virens, margine effusus ; apothecia -^r-mm. lata, 



hemisphaerica, nigra, interne tenuissime thallino-velata et opaca, 

 snperne nuda et nitida, vertice demum latiuscule umbilicato-aperta; 

 perithecium dimidiatum; paraphvses molles, subindistinctae ; asci 

 globoso-obovoidei, 8-spori ; sporae 18-22 a longae, 10-12 a latae, 

 ovoideae. — Ad neo-zelandicam V. submargaceam Kn. accedit, 

 sed apothecia superne late nudata et paullo minora. — Ad saxa non 

 calcarea in Paraguay. 



239. Haplopyrenula acervata Miill. Arg.; thallus l'uscidulus, 

 tenuissimus, rnacularis, epidermide demum membranulae niveae 

 instar secedente nudatus; apothecia 2/10mni lata, convexa, nigra, 

 dimidiata, gregatim dense cohferta et hinc inde conftuentia ; sporae 

 in ascis 8-nae, 12-18 y. longae, 5-7 a latae, subcuneato-obovoideae, 

 utrinque late obtusae, mox fuscae. — Proxima H. v'ulgari, Miill* 

 Arg. sed apothecia gregatim approximata. — In foliis Rutaceae 

 cujusdam (Balansa exs. n° 2519), et alius arboris prope Goaguazu : 

 n°' 3604. 



240. Microthelia micula Korb. Syst. Lich. Germ. p. 273. — 

 Corticola ad Asuncion. 



241. Microïhelta hemisphaerica Miill. Arg. Pyren. Gub. p. 417. 

 — Corticola ad Paraguari. 



242. Pyrenula gracilior Miill. Arg.; thallus argillaceo-flavicans, 



