320 J. lltlANA ET J.-E. PLANCIION (w. Nl'L/INDER;. 



vel fusiformi-oblongse, ssepissime 12-loculares, longit. mul ,038- 

 58, crassit. ,nm .009-0 mm ,012 (iodo cœr descentes). 

 Hab. Tequendama, quercicola, altit. 2500 metr. (coll. Lindig., U). 



Obs. — Pyrenula discolor Ach. est minus evolutum dodecamerum no- 

 strum crescens immixtum cum Ascidio Cinchonarum, cujus sit varietas 

 protubérantes thallinis apotheciorum supra haud depressis, margine 

 ostioli (demum dilata ti)) crasso turgido Nomen discolor Acharii respicit 

 statum minus evolutum, ostiolo « suboccluso»; in speeimine archetypo 

 hb. Ach. sporaa 12-14 locularcs, longit. mm ,056-72, crassit. mm , 011-12. 



2. Ascidium postpositum Nyl. — Thallus albidus tenuis sub- 

 determinatus vel subefFusus; apotliecia mediocria, in protube- 

 rantiis thallinis obtusis (latit. circiter 1 millim. vel minoribus) 

 plus minusve discretis inclusa, margine crasso, ostiolo minuto 

 (diam. fere m ™,2), fundo (epithecio) nigro, interdum papilla 

 obturascente albida; thecae monosporse, spora3 incolores (aut 

 demum vetustœ leviter fuscescentes) oblougse murali-divisœ, 

 longit. ,n, \105-0 mm ,180, crassit, ,mn ,023-43 (iodo cœrule- 

 scentes) . 



Hab. Tequendama, ad corticem Quercus, altit. 2500 metr. (Lindig). In 

 Louisiana, ex hb. Tuckerman. 



Obs. — Thelotrema monosporum Nyl. comparandum habet thallum 

 magis album tenuissimum opacum, protuberantias apotheciorum de- 

 pressiores vel obsoletas, apotliecia et ostiola minora, sporas l'uscas, etc. 

 Hymenium latit. circiter mm ,5 (in Th. monosporo latit. mm ,25). 



3. Ascidium rhabdosporum Nyl. — Thallus albidus tenuis ru- 

 gulosus vel subgranulato-inœqualis, hinc inde rimosus, determi- 

 natus; apotliecia in protuberanliis majusculis (latit. u 2 inm ,5 vel 

 nonnihil minoribus) obtusis inœqualibus (subrugosis vel sub- 

 granulato-insequalibus) ostioli depressi margine haud prominulo, 

 epithecio nigro, hymenium depressum (latit. m,n ,9-l rani ,2, altit. 

 cire. mm , c 25) ; spora3 1-8 in thecis (saepius 1-4) fusiformes 

 2G-3ù-loculares, longit. um ,175-0 ,nm ,205, crassit. ,UI %015-17 

 (iodo cserulescentes) . 



Hab. Pie de Cuesta, ad corticem arboris, altit. 1200 metr. (Lindig). 

 Obs. — Sporis minus crassis mox differt ab Ascidio Dominyense, quo 



