344 112 
Thallus KHO superne et intus lutescens, primum tantum margine 
sorediosus, in partibus vetustis demum simul etiam centro sorediosus, 
subtus albidus, rhizinis albidis. Ster. 
Ad corticem arboris prope Lem Ngob (no. IX, XXXII). 
Area: Var. mollescens in insulis tropicis Americae, Africae et Asiae lecta est. 
Sect. 2. Hypomelaena (Trev.) Wain. 
Dimelaena sect. Ul. Hypomelaena Trev., Sul Gen. Dimel. (Atti Soc. 
Ital. Se. Nat. Xi, 1868), p. 20. Pyaxine *Dirinaria Tuck., Syn. North 
Am. (1882), p. 78. 
20. Ph. picta (Sw.) Nyl., Syn. Lich. (1858—60), p. 430 (pr. p.); 
Wain., Etud. Lich. Brés. I (1890), p. 150. 
Ad corticem arborum prope Lem Ngob (IX, XXXII). Ad corticem 
Arecae catechu prope Stationem navalem in insula Koh Chang (XVII, 
XXI, XL, fig. 2,15). In rupe eruptione formata in insula Koh Lom in 
viciniis insulae Koh Chang (no. XXXI). Fert. 
Area: In zonis tropicis et in partibus calidioribus zonarum temperatarum 
crescit. 
2. Pyxine Fr. 
21. P. Schmidtii Wain., Lich. Nov. Rar. IV (Hedwigia 1907), p. 170. 
Thallus albus aut albidus, laevigatus, esvrediatus, isidiis destitutus, 
intus albus, KHO superne et intus lutescens, irregulariter laciniatus, laciniis 
circ. 1—0,4 mm. latis, irregulariter multifidis, contiguis et inter se sub- 
continuis, applanatis aut sumino apice saepe concaviusculis. Apothecia 
1—0,5 mm. lata, lecideina, extus tota nigra, disco nigro, nudo. Sporae 
1-septatae. 
Thallus opacus, pruina destitutus, adpressus, subtus nigricans, rhizinis 
nigricantibus, KHO intus reactionem luteam solam praebens, at oxidatione 
aut alia mutatione chemica postea fusco-rubescens. Apothecia omnino 
gonidiis destituta. Excipulum strato corticali fusco-fuligineo, tenui, KHO 
prope hymenium rubescente, ceterum non reagente, strato medullari 
stramineo, KHO non reagente. Hypothecium fuscescens, KHO non reagens. 
Hymenium circ. 0,070 mm. crassum, jodo persistenter caerulescens. Epi- 
thecium aeruginoso-fuligineum, KHO pulchre violascens. Paraphyses gra- 
ciles, simplices, apicibus incrassatis, arcte cohaerentes. Sporae 8: nae, 
distichae, fuscescentes, ellipsoideae, haud constrictae, apicibus obtusis aut 
rotundatis, in apicibus membrana crassiore, long. 0,016—0,014, crass. 
0,007 —0,006 mm. 
Ad truncos arborum in silva prope Stationem navalem in insula 
Koh Chang (no. XXV). 
22. . retirugella Nyl., Lich. Exot. (1859), p. 240, Enum. Lich. 
Antill. (1869), p. 10, Syn. Lich. Hl (1888), p. 3; Wain., Etud. Lich. 
Brés. I (1890), p. 155; Malme, Gatt. Pyx. (Bih. K. Sv. Vet.-Ak. Handl. 
93 Ill, 1897), p. 33. 
