U7 
sera 0. phlyctidioidem Müll. Arg. L. Exot., n® 79 locanda est. 
a qua recedit thallo albiore, tenuissirao, laevi, apotheciis raino- 
ribus et colore disei. Priraa fronte speciera Phlyctellae bene 
simulât. — Corticole : Buenos-Aires (Pitt, n® 6106). 
136. Oeellnlaria umbillcata Müll. Arg. (sp. nov.). — Thallus glauco- 
albidus, tenuissimus, crebre subundulato-granulosus, caeteruui 
continuus; apothecia 1 mm, lata, nano-heraisphaerica, crassa, 
subrugoso-v. subgranoso-inaequalia, verlice laliuscule umbili- 
cato-depressa, in depressione ostiolum circ. i/io mm. latum 
regulare integrum ostendentia ; depressio circa aperturam in 
annulum exiguum, tenuissimum, pallidioremincrassata; perithe- 
cium interius tectum fulvura; hypothecium hyalinum j columella 
centralis nulla; paraphyses facile liberae; sporae 8-nae, 
uniseriales, 17-21 //. longae, 7-9 /j. latae, 6-8-locuIares. — A 
proxima O. calvescente (Fée) Müll. Arg. dififert thallo subgranu- 
loso, apotheciis crassioribus sed nanioribus, baud laevibus, basi 
non subconstrictis et vertice profundius umbilicatis. Sporae 
dein ambitu crassiores sunt. — Corticole; Terraba (Pitt, 
n® 6106). 
137. Thelotrema myrioporoides Müll. Arg. (sp. nov.) — Thallus 
argillaceo-glaucus, tenuis, continuus, laevis, ambitu margine 
aurantiacocinctus; apothecia nonnihil gregatim conferta, innata, 
defossa, obscure carnea, margine acuto baud emergente nec 
urceolari-dilatato circ. i/io mm. lato indicata; lamina undique 
hyalina; sporae 4-6-nae, oblongo-ellipsoideae, 17-22 f/. longae, 
8-10 /X latae, 4-loculares; loculi interraedii semel longitrorsum 
divisi. — Simile Occllulariae myrioporae Müll. Arg. et afRnibus, 
sed sporas offert parenchyraaticas et dein juxla Th» subcaesium 
Nyl. (e Brasilia) et juxta malaccense Th. subconformc Nyl. 
locandum est. A Th. subcaesio distat thallo circa ostiola non 
urceolari-depresso, et a Th. subconformi colore thalli et sporis 
minus divisis. — Discus in speciminulo viso fere undique 
elapsus. — Corticole : Boruca (Pitt. n. 6104), 
138. — velatuni Müll. Arg. (sp. nov.). — Thallus albus, tenuissimus, 
farinulentus ; apothecia 4/5 mm. lata, late aperta, plana, leviter 
tantum emergeutia, margine tenui acuto suberecto obsolete 
lobato et dein integro intus linea nigra duplicato-cincta, ambitu 
suborbicularia, regularia v. leviter obtuse angulosa; discus 
