54 A. ZAHLBRUCKNER, DIF. ELECHTEN. 



Rinodia (sect. Orcularia) philomelensis A. Zahlbr. nov. spec. 



Thallus epilithicus, crustaceus, uniformis, maculatim effusus, tenuis 0.2-0,3 mm 

 crassus, subtartareus, cinereus, opacus, KHO — , CaCl 2 0. — , areolato-rimosus, areolis 

 planis vel planiusculis, parvis, 0.2 — 0,4 mm latis, superne laevigatis, fissuris tenuibus 

 separatis, soredia et isidia non gerens, in margine linea obscuriore non cinctus; stra- 

 tum corticale duplex, strato externo decolore, inaequali, ex hyphis intricatis, non 

 inspersis formato, strato interiore umbrino-fusco, etiam ex hyphis intricatis, sed non 

 pulverulento-inspersis composito; gonidia stratum sat amplum, plus minus continuum 

 formantia, cellulis globosis, 10—16 \>. latis; medulla alba, KHO — , CaCl 2 2 — , J — , 

 ex hyphis ramosis, intricatis, leviter inspersis, ad 3,5 crassis, leptodermaticis formata. 



Apothecia crebra, plus minus approximata, rotunda, primum immersa, aspici- 

 loidea, concava et margine prominulo cincta, demum adpresso-sessilia, leviter convexa, 

 usque 0,8 mm lata, discus nigerrimus, opacus, epruinosus, madefactus in fuscum 

 vergens; excipulum dimidiatum, solum ad latera hymenii evolutum, ex hyphis con- 

 glutinatis et decoloribus formatum: hypothecium decolor, molle, ex hyphis verticalibus, 

 sensim im hymenium abeuntibus, conglutinatis formatum, J coeruleum; hymenium 

 superne umbrino-fuscum, NO ; , olivascens, strato angusto decolore et amorpho super- 

 tectum, caeterum decolor, non inspersum, 110 — 130 \>. altum, J violaceo-coeruleum; 

 paraphyses filiformes, ad 1.5 [>■ crassae, simplices, eseptatae, ad apicem clavatae, vix 

 conglutinatae; asci ellipsoideo-clavati, ad apicem rotundati et membrana incrassata 

 cincti, 8-spori; sporae in ascis biseriales, e fumoso fuscae, ovales vel ellipsoideae, 

 luminibus binis, circa Va longitudinis sporae aequantibus, versus basin obconico- 

 angustatis et isthmo latiusculo junctis, septo tenui, sed distincto, 17 — 22 <i longae 

 et 10—12 <>. latae. 



Conceptacula pycnoconidiorum sat crebra, immersa, globosa, vertice nigricanti, 

 madefacto fuscescente; fulcra endobasidialia, basidiis parum ramosis, brevibus, sep- 

 tatis, cellulis brevibus; pycnoconidia oblonga, recta, in medio leviter constricta, circa 

 2 jj< longa et ad 0,5 \>. lata. 



Falkland-Inseln: Westinsel, Port Philomel, Halfvvay Cove, auf Sandstein. 



Der Bau der Sporen ist sehr charakteristisch. Ich kenne keine Art, welche ich, 

 nach den gegebenen Beschreibungen, ihr nahe bringen könnte. 



Pliysciaceae. 



Physcia adscendens Bitt. 



Peuerland: am Rio Grande, zwischen Moosen, steril (Dusen). — Diese Flechte 

 ist bisher fiir das Feuerland nicht verzeichnet. 



Anaptychia magellanica A. Zahlbr. nov. spec. 



Thallus rosulas compactas, usque 3,5 cm latas formans, tenuis, 0,oi— 0,oi8 mm 

 altus, albidus opacus, KHO flavescens, CaCI 2 Oo — , rigidiusculis, in margine loba- 

 tus, lobis brevibus, usque 2 mm longis, digitato incisis, eciliatis, lobis thalli caeteris 



