( 26 ) U7 



«em 0. phlyciidioidem Miill. Arg. L. Exot., n° 79 locanda est. 

 a qua recedit thallo albiore, lenuissimo, laevi, apolheciis mino- 

 ribus et colore disei. Prima fronte speciem Phlyctellae bene 

 simulat. — Corticole : Buenos-Aires (Pitt, no 6106). 

 136. Ocellnlaria umbilicata Miill. Arg. (sp. nov.). — Thallus glauco- 

 albidus,tenuissimus, crebre subundulato-granulosus, caeterum 

 continuus; apothecia 1 mm. lata, nano-hemisphaerica, crassa, 

 subrugoso-v. subgranoso-inaequalia, vertice latiuscule umbili- 

 cato-depressa, in depressione ostiolum circ. i/io ram. latum 

 regulare integrum ostendentiaj dcpressio circa aperturam in 

 annulumexiguum,tenuissimum,pallidioremincrassata;perithe- 

 cium interius tectum fulvum; by pothecium hyalinum; columella 

 centralis nulla ; paraphyses facile liberae ; sporae 8-nae, 

 uniseriales, 17-21 // longae, 7-9 //. latae, 6-8-Ioculares. — A 

 proxima 0. calvescenle (Fee) Miill. Arg. differt thallo subgranu- 

 loso, apotheciis crassioribus sed nanioribus, baud laevibus, basi 

 ncn subconstrictis et vertice profundius umbilicatis. Sporae 

 dein ambilu crassiores sunt. — Corticole : Terraba (Pitt. 

 n« 610b). 



137. Tbelotreiua myrloporoides Miill. Arg. (sp. nov.). — Thallus 



argillacco-glaucus, tenuis, continuus, laevis, ambitu niargine 

 auranliaco cinclus; apothecia nonnihilgregatimconferta,innata, 

 defossa, obscure carnea, margine aculo baud emergente ncc 

 urceolari-dilatato circ. i/io mm. lato indicata; lamina undique 

 hyalina; sporae i4-6-nae, oblongo-ellipsoideae, 17-22 /jl longae, 

 8-10 fx lalae, 4-loculares; loculi intermedii scmel longilrorsum 

 divisi. — Simile Ocellulariae myrioporaeMnW. Arg.et affinibus, 

 sed sporas ofFert parenchymaticas et dein juxla Th. subeaesium 

 Nyl. (e Brasilia) et juxta malaccense Th. subcon forme Nyl. 

 locandum est. A Th. sabcaesio distat thallo circa ostiola ncn 

 urceolari-depresso, et a Th. tubconformi colore thalli etsporis 

 minus divisis, — Discus in speciminulo viso fere undique 

 elapsus. — Corticole : Boruca (Pitt. no6104). 



138. — velatuni Miill. Arg. (sp. nov.). — • Thallus albus, lenuissimus, 



farinulentus; apothecia 4/5 mm. lata, late aperta, plana, leviter 

 tanlum emcrgentia, margine Icnui acuto suberecto obsolete 

 lobalo ct dein intogro intus linea nigra duplicato-cincla, ambitu 

 suborbicularia, rcgularia v. leviter obtuse angulosaj discus 



