82 
(Pyxine) 
473. P. convexa Mtill. Diagn. Soc. p. 4. — Ramulicola 
et saepe caespitibus Roccellce Montagnei obtecta in insula 
Socotra: Balfour, Schweinfurth. — Endem. 
474. P. petricola Nyl. in Cromb. Rodr. p. 435. — Saxi- 
cola in insula Rodriguesii: Balfour. — Endem. 
475. Umbilicaria pustulata (L. Spec. p. 1150) Hftm. 
1. c. t. 28, 29 f. 4. — Super saxa in insula Madera (Mand. 
Mad. 22). — Europ., China, Amer. sept. — F. minor Nyl. in 
Cromb. Cap. p. 171. — In Monte Tabulari: Eaton. — Endem. 
— Var. papillata Hmp., Tuck. Syn. North Am. p. 82. — In 
Promontorio Bonae Spei. — Endem. 
476. U. membranacea Laur. Hb. — Saxicola in Promon¬ 
torio Bonae Spei: Drege. — Endem. — Bona videtur species: 
thallus tenuiter membranaceus cinerascens epruinosus glaber, 
subtus pallidus, laevigatus; apothecia minora (diam, ad 0,8 
mm). Hymenium superne nigrofuscum in hypothecio pal¬ 
lido, paraphysibus discretis gracilibus, thecis amplis mono- 
vel bisporis. Sporae muriformes, longit. 0 ,o 6 -io, crassit. 0 ,028-50 m; 
gelatina hymenea imprimis thecarum iodo ccerulescens. Cfr. 
Nyl. Syn. II p. 5. 
477. U. papulosa (Ach. L. U. p. 226) Nyl. En. p. 107.— 
Saxicola in Promontorio Bonae Spei. — Himalaya, Amer. sept. 
478. U. glauca. Thallus suborbicularis diam. 5-7 cm, 
membranaceus firmus glaucocinereus, pulvere quasi grosso 
densissime obductus, nonnihil papulosus et rimulosus, subtus 
nudus niger asper parce radiatim striatus, lacunis foveo- 
laribus parcis. Apothecia mediocria sessilia lecideina, mar¬ 
gine nigro crasso scabro, disco concolore. Epithecium fusco- 
nigrum, hypothecium incolor, paraphyses discretae. Sporae 
solitariae vel (in thecis junioribus) binae fuscae ellipsoideae 
muriformes longit. 0 ,o 6 o-so, crassit. 0,025-37 mm. Thallus K 
