266 J. 1RIANA ET J.-E. PLANCIION. { W. NYLANDER.) 



albidus tenuis opacus subfarinosus determinatus ; apothecia 

 albo-suffusa ( pallido-lutescentia albo-pruinosa) linearia (latit. 

 u,m ,5-0 uim ,6), recta vel subflexuosa, epithecio suffuso angusto 

 vel hiascente coneaviusculo, intus incoloria; sporse 4 nœ (sat raro 

 2-5 in Ihecis) oblongae muralKdi visse, longit. mm ,075-0 mm ,425, 

 crassit. ram , 016-30 (minores longit. haud amplius mm ,046). 

 Gelatina hymenea iodo non tincta, nec sporge, protoplasma 

 thecarum vinose rubens. 



Tequendama, Canoas, altit. 2600 metr., ad corticem arboris (Lindig). 



Obs. — Ad slirpem Graphidis frumentariœ est pertinens species, 

 afïinis Gr. cometiœ Fée, a qua differt thallo molliore, laxius contexto, 

 apotheciis simplicioribus (epithecio pallido et demum hiascente), etc. 

 Gonidia diam. mm ,0ll-lZi. In Gr. cometia etiam Novo-Granatensi (coll. 

 Lindig. 2889, ex Honda) sporai saepius 8 nœ longit. ,mn ,065-0 ,nra ,l/iO, 

 crassit. mm 5 18-25; eadem sporis minoribus (8 ,lis ) longit. n,m , 035-70, 

 crassit. mm , 011-16 (iodo cœrulescentibus, lhalamio haud tincto) datur 

 in Lepr. coll. Guyan. n° 208 (nornine « Gr. hololeuca » Mnt.). — Com- 

 paretur Gr. hololeucoides Nyl., cui thallus albidus tenuis vel tenuissimus, 

 apothecia subconcoloria vel flavescenti-albida turgidula (latit. m,n ,7~ 

 mm ,8) oblongo-ellipsoidea vel oblongo-linearia, utroque apice obtu- 

 siuscula, recta aut flexa, epithecio angusto, intus incoloria; sporse 

 2-8 I,œ oblongœ murali - divisas , longit. mm ,056-0 mm ,100, crassit. 

 mm , 011-18, hypothecium incolor, nec gelatina hymenea nec sporse iodo 

 tinctae (sed protoplasma thecarum iodo vinose rubescens). Ad corticem 

 in Mexico (Ghiesbreght), ex Mus. Paris. (1). 



Platygrapha rimata (Flot.) Nyl., Prodr. Lich. Gall. Alger., 

 p. 162. — Thallus albus vel albidus rimosus vel rimoso-diffractus, 

 determinatus; apothecia fusconigra vel nigra anguloso-difformia 



(1) In Graphide hololeuca Mnt., Syll., p. 346 (pr. p.), cui nomen servari 

 debeat, thallus albus vel albidus tenuissimus subgranulato-insequalis ; apothecia 

 concoloria (epithallino-obducta) linearia flexuosa, marginibus tumidulis, epithe- 

 cio rimiformi ; sporae 2-8 nœ incolores muraii-divisse (longit. mm , 095-1 25, cras- 

 sit. O™" 1 , 01 2-24, iodo haud tinctae, nec protoplasma thecarum, sed gelatina 

 hymenea thalamii pro parte vel hypothecii incoloris pro parte iodo cœrulescens). 

 — Graphis tumulata Nyl. hic memoretur. Thallus ei macula pallida verrucose 



