460 DR. J. MUELLER ON NEW LICHENS. 
robustiores, vertice non impresse.—Corticola, in prov. Rio de 
Janeiro: Glaziou. 
25. GraPHina (§ CHLOROGRAMMA) RHABDOCARPA, Muell. Arg. 
thallus ochroleuco-albidus, mediocris, subrugulosus, demum dif- 
fracto-rimosus; lirelle basi innate, inferne sensim in thallum 
abeuntes, simplices, rectw, varie curvate, validiuscul, thallino- 
corticate, longitrorsum sulcat#, rimuld fusca aperientes ; peri- 
thecium pallidum, apice sub cortice in lamellas diviso fuscum 
v. fulvo-fuscum ; spore 2-4ne, circ. 100 p longe et 22 p late, 
dense locellose—A simili Gr. pallida, Muell. Arg., differt 
lirellis paullo validioribus et rim& fusca, a Gr. fasciata, Muell. 
Arg., thallo albiore et sporis majoribus et dein a Gr. Lorentzit, 
Muell. Arg., lirellis minus emersis, basi non constrictis et 
sporis non solitariis.—Corticola, prope Rio de Janeiro: Glaziou, 
n. 18046. 
26. Grapuina (§ PhatyeraMMINna) ALBA, Muell. Arg. ; thallus 
albus y. nonnihil argillaceo-albus, tenuis, tuberculoso-ruguloso- 
asperulus, superficie firmus; lirelle semiemerse, breves, valide 
thallino-obtect ; margines demum late hiantes et crispuli v. 
diffracti; discus planus et strato thallino tectus; perithecium 
basi deficiens, ad latera undique evolutum sed tenue, fulvo-fusci- 
dulum ; spore solitarie, circ. 90 » longe et 33 p late, erebre 
locellosz, locelli in quaque serie transversali 5-7.—Habitu similis 
Gr. obtectule, Muell. Arg., e Costa Rica, sed lirella bene emerg- 
unt et spore multo majores sunt, et a proximaé Gr. columbiana, 
Muell. Arg., dein differt thallo non glaucescente, firmiore et 
apotheciis et sporis minoribus.—Corticola, in prov. Rio de Janeiro ; 
Glaziou, n. 18042. 
27. Pxxoararuts (§ MELANOBASIS) TREMULANS, Muell. Arg. ; 
thallus flavescenti-pallidus, mediocris, leviter granoso-rugulosus, 
nitidulus; lirelle stellatim in orbillam usque 12 mm. latam 
discreto-longiramem divise, rami parce dendroideo- aut dicho- 
tomo-divisi, superne sepe peculiariter breviramillosi, undique 
subflexuosi, ex erumpente emergentes, + mm. lati; margines 
prominentes, undique thallino-corticati, superne mox cinereo- v. 
subcesio-pulverulenti et tremuloso-crispuli, demum irregulariter 
patentes ; perithecium undique nigrum, sub lamina incrassatum ; 
discus niger et nudus; spore 8ne, circ. 20 » long» et 8 p late, 
4-loculares.—Juxta Ph. diversam, Muell. Arg., et Ph. melano- 
