DR. J. MUELLER ON NEW LICHENS. 453 
5. OCELLULARIA EMERSELLA, Muell. Arg.; Thelotrema schizo- 
stomum, Krempelh. in Flora (1876), p. 222, non autem Th. schizo- 
stomum, Tuck. Obs. 1862, p. 411, quod est Ocellularia schizostoma, 
Mill. Arg. in Nuov. Giorn. Bot. Ital. xxiii. p. 395, nec Trype- 
thelium schizostomum, Leight. in Trans. Linn. Soc. xxvii. p. 184, 
quod nune Thelotrema schizostomum, Muell. Arg—A simili 
O. emersa, Muell. Arg. in Flora (1886), p. 310, sub n. 1037, 
differt apotheciis paullo minoribus, margine acutiore, apertura 
magis acutangula et dein sporis duplo brevioribus. Perithecium 
interius basi late et breviter in columnulam evolutum est.—Cor- 
ticola, prope Rio de Janeiro: Glaziou, n. 3260. 
6. THELOTREMA ANNULATUM, Muell. Arg. ; thallus glauco- 
albidus, tenuissimus, continuus et sublevis, opaco-farinulentus ; 
apothecia $ mm. lata, depresso-hemispherica, leviter prominentia, 
regularia et levia ; margo obtusus, interior linea annulari simplice 
v. duplice (imo et triplice) indicatus, haud prominens; discus 
parvus, niger, strato albido tectus, demum subnudatus; hypo- 
thecium nigrum ; columnula basalis nulla ; spore in ascis 2-4nex, 
ellipsoideo-cylindrice, 70-85 p long, 20-25 p late (hyaline), 
€opiose parenchymatice ; locelli in series transversales circ. 20 
dispositi, in quaque serie 4—5.—Species parum conspicua facileque 
effugiens, juxta ceylonense Th. disciforme, Leight. in Trans. Linn. 
Soe. xxvii. p. 170, locanda est.—Corticola, in prov. Rio de Janeiro : 
Glaziou, n. 5474. 
7. THELOTREMA PRESTANS, Muell. Arg.; thallus olivaceo-albidus 
v. subargillaceus, tenuis, continuus et levis v. sublevis, maculis 
orbicularibus subregulariter sparsis copiosis hine inde acute cir- 
cumscriptis niveo-farinosis 7}2,—;%; mm. latis (intus globoso-con- 
cavis) ornatus ; apothecia 2-21 mm. lata, regulariter orbicularia, 
subdepresso-hemispherica, levia, basi sensim in thallum abeuntia, 
apice depresso albido-ostiolata ; ostiolum haud prominens, inte- 
grum, 2 mm. latum aut minus; perithecium interius undique 
completum, subnigrum ; lamina aquoso-hyalina ; spore solitarie, 
100-180 » longex, 30-38 » late, utrinque paullo angustate 
copiose parenchymatose.—Est proximum Th. depresso, Montg., a 
quo recedit thallo pallidiore niveo-sorediosulo et apotheciis am- 
plioribus et minus depressis.—Corticola, prope Rio de Janeiro : 
Portella. 
8. THELOTREMA SCHIZOSTOMUM, Muell. Arg. (non Tuck.) ; hic 
spectat Trypethelium schizostomum, Leight. in Trans. Linn. Soc. 
2xK2 
