124 353 
in sched. speciminis Nylanderiani, columella destitutum. Etiam in Nyl. 
Lich. Ceyl. (1900), p. 17, commemoratur, at specimina Ceylonensia haud 
omnino identica cum speciminibus Singaporensibus. In comparabili Th. 
porinoide Mont. (Nyl., Lich. Andam., p. 8, Lich. Ceyl., p. 17) perithecium 
est albidum. 
Ad corticem arboris in silva prope flumen Klong Sarlakpet in insula 
Koh Chang (no. XXVI). 
39. Th. (Ocellularia) microascidium Wain., 1. c. p. 176. 
Thallus tenuis aut sat tenuis, continuus, leviter verruculoso-inaequalis, 
glaucescenti- vel stramineo-glaucescenti-albidus, leviter nitidus, KHO parum 
reagens (olivaceus). Excipulum verrucam cire. 0,5—0,4 mm. latam, de- 
presso-hemisphaericam, basin versus abruptam aut partim leviter constrictam, 
saepe plus minusve verrucoso-inaequalem, vertice applanato instructam 
formans, ostiolo circ. 0,1—0,3 mm. lato, rotundato, margine ostiolari 
tenui, integro, thallo concolore, haud aut interdum demum paululum ele- 
vato, interdum demum (praesertim in apotheciis morbosis) duplice et 
perithecium nigricantem ostendente. Apothecia sat crebra, disco livido- 
nigricante aut morboso plus minusve pruinoso. Amphithecium intus dilute 
roseum aut flavescens, KHO rubescens. Perithecium dimidiatum, latere 
fuligineum, basi deficiens, columella centrali fuliginea. Sporae 8: nae, 
distichae, oblongae aut fusiformi-oblongae, apicibus obtusis aut rotundatis, 
3—5-septatae, decolores, jodo violaceo-caerulescentes, long. 0,017—-0,018, 
crass. 0,007 mm. 
Thallus linea hypothallina fusconigricante limitatus. Hypothecium 
albidum, tenue. Hymenium circ. 0,080 mm. crassum, jodo non reagens. 
Epithecium decoloratum. Paraphyses simplices, apice parum incrassatae. 
Sporae halone nullo indutae, loculis lenticularibus. — Affine est Th. 
granulatulo Nyl. (Fl. 1876, p. 561), quod jam thallo magis verruculoso- 
inaequali ab eo differt. Habitu in memoriam revocans Th. (Leptotrema) 
Bahianum Ach. var. obturascens Nyl. (Lich. Nov.-Gran., 1863, p. 453, 
ed. 2 p. 332), in quo amphithecium intus item KHO rubescens, at thallus 
KHO dilute rubescens deindeque fuscescens. 
Ad corticem arboris in capite septentrionali insulae Koh Kong (no. XI). 
2. Gyrostomum Fr. 
40. G, scyphuliferum (Ach.) Fr., Syst. Orb. Veg. (1825), p. 268; 
Wain., Etud. Lich. Brés. Il, p. 86. 
Ad corticem Arecae catechu prope Stationem navalem Lem Dan in 
insula Koh Chang (no. XVII, XXI). 
Area: In regionibus calidioribus distributum. 
Trib. 10. Lecanactideae. 
1. Lecanactis (Eschw.) Wain. 
41. I. deminuens (Nyl.) Wain. Lecidea premnea f. deminuens Nyl., 
Fl. 1867, p. 373 (conf. infra), Syn. Lich. Nov. Cal. (1868), p.54; Norrl., 
93 
