148 Acta Soeietatis pro Fauna et Flora fennica, VII. 



Thallus radiatim costato-rugulosus. 

 Ad folia perennia arborum prope Rio de Janeiro, n. 170 d. 

 — Thallus opacus, maculas saepe rotundatas formans. Gonidia 

 phycopeltidea, cellulis oblongo-cylindricis aut cylindricis, 0,oos— 

 0,oo4 millim. crassis, sat leptodermaticis, ad septas haud aut le- 

 vissime constrictis, in series radiantes concatenatis et in mem- 

 branam simplicem connatis. Apothecia thallo innata, demum 

 plus minusve elevata, disco 0,3—0,2 5 [—0,4] millim. lato, piano. 

 Perithecium fusco-fuligineum, cire. 0,oio millim. crassum, conni- 

 venti-obliquum, ex hyphis suberectis conglutinatis increbre septa- 

 ls formatum, strato thallino gonidia continente, basi sensim in 

 thallum abeunte obductum. Hymenium circ. 0,0 7 millim. cras- 

 sum, jodo fulvescenti-vinose rubens. Epithecium sordidc palli- 

 dum aut dilute fuscescens. Paraphyses ramoso-connexae, su- 

 perne flexuosae, apice baud aut vix incrassatae. Asci clavati, 

 circ. 0,oi2 millim. crassi, membrana tota leviter incrassata. Spo- 

 rae 8:nae, apicibus obtusis, halone nullo indutae, medio saepe 

 levissime constrictae, cellulis subcylinclricis, fere aeque longis, 

 cellula secunda (ex apice superiore) saepe reliquis paullo crassiore. 



6. Arthonia. 



Ach. in Schrad. Journ. 1 B., 3 St. (1806) p. 3 pr. p., Licli. Univ. (1810) 

 p. 25; Dufour, Rev. Gen. Opegr. (1818) p. 5; Till., Mem. Lick. II (1852) 

 p. 192; Leight,, Mon. Brit. Graph. (1854) p. 51; Nyl., Syn. Artli. (1856) p. S8; 

 Th. Fr., Gen. Heterolich. (1861) p. 96 (emend.); Kickx, Mon. Graph. Belg. 

 (1865) p. 22; Linds., Mem. Sperm. Crust. Lick. (1870) p. 279, tab. XIV fig. 

 1—9, 11—17; Tack., Gen. Lich. (1872) p. 217; Frank, Biol. Krustenflecht. 

 1876 (Bot. Jahresber. 1S76 p. 70); Leight., Lich. Great Brit. 3 ed. (1879) p. 

 414; Almqu., Mon. Arth. Scand. (1880) p. 8; Mull. Arg., Graph. Feean. (1S87) 

 p. 4 et 53 (em.); Holler, Cult. Flecht. (1S87) p. 37; Nyl. in Hue Addend. 

 (1888) p. 253. (Rehm in Rabenh. Krypt.-Fl. Ill 1890 p. 280.) 



Thallus crustaceus, uniformis, epiphloeodes aut rarius liy- 

 pophloeodes, hypothallo aut hyphis medullaribus substrato affixus, 

 rhizinis et strato corticali destitutus. Stratum medullare stuppeum, 

 hyphis tenuibus, leptodermaticis, lumine ccllularum comparatc sat 

 lato. Gonidia ad species diversas minores majorcsvc Trente- 

 pohliae (Chroolepi) pertinentia, cellulis anguloso-globosis aut 

 ellipsoideis, primum concatenatis, filamenta saepe parce ramosa 

 formantibus, demum saepe pro parte etiam liberis, aul rarius 



