Urceolaria. 75 



septis transversalibus 5 4 et septis longitudinalibus paucis (1 2)^ 



fusco-nigrae, long. 0,0 2 4 0,oi6, crass. O,oii 0,oo8 millim. 



3. U. chlorolenca Tuck., Obs. Lich. (1864) p. 268, Syn. 

 North Am. II (1888) p. 150 (Wright, Lich. Ciib. n. 123: mus. 

 Paris.). 



TJiaUus crassitudine mediocris, subcontinuus, verrucoso-inae- 

 qualis, caesio-glaucescenti-albidus, esorediatus, neque I, nec KHOy 

 nec Ga Cl^ O^ reagens, KHO (Ca Cl^ O.^) rubescens. Apothecia 

 demum aperta planaque, margine sat tenui, subintegro. Exci- 

 puliim proprium fusco-fuligineum. 



Supra cementum prope Rio de Janeiro, n. 38. Hanc spe- 

 ciem exactius non descripsimus, quia specimen nostrum haud 

 est satis bene evolutum. Tliallus KHO (Ca CU O^) rubescens. 

 Apotliecia thallo immersa. 



Trib. 16. Tlielotremeae. 



Thallus crustaceus, homoemericus aut heteromericus. Stra- 

 tum corticale haud evolutum aut tenue amorphumque. Stratum 

 medullare stuppeum, totum gonidia continens aut parte inferiore 

 gonidiis destitutum, hyphis leptodermaticis. Gonidia chroolepoi- 

 dea (Trentepohliae umbrinae Bornet simiHa). ^^;o^/ima thallo 

 innata, immersa permanentia aut demum emergentia et verrucas 

 iOrmantia (aut raro margine repetito-prolifera: Polystroma 

 Clem. ^), orbicularia aut raro oblonga, hymenia soKtaria aut plura 

 continentia, disco impresso urceolatove, punctiformi aut dilatato. 

 Ferithecium proprium bene evolutum, ampjhithecio thallino goni- 

 dia continente vulgo obductum. Paraphyses bene evolutae, sim- 

 plices aut ramoso-connexae. Sporae breves aut longae, oblongae, 

 ellipsoideaeve aut ovoideae aut fusiformes aut elongatae, septatae 

 et locuhs lenticularibus instruetae,- aut murales, decolores aut 

 demum obscuratae. 



1. Ttielotrema. 



Ach., Lich. Univ. (1810) p. 62 et 312 (pr. p.), Syn. Licli. (1814) p. 113 

 pr. p.; Eschw., Syst. Lich. (1821) p. 15, in Mart. Lich. Bras. (1833) p. 172; 



^) Folystroma Clem. vel Ozodadium Mont. forsan huc pertinet, ut ait 

 Nyl. in Hue Addend. d. 124. 



