— 121 — 



in sched. speciminis Nylanderiani, columella destitutuni. Eliam in Nyl. 

 Lich. Ceyl. (1900), p. 17, commemoralur, at specimina Geylonensia 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 arboi-is in silva prope flumen Klong Sarlakpet in insula 

 Koh Chang (no. XXVI). 



39. Th. (Ocellularia) mieroascidium 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 circ. 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 osliolari 

 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 deilciens, 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. — Affme est Th. 

 gramdatiilo Nyl. (Fl. 1876, p. 561), quod jam thallo magis verruculoso- 

 inaequali ab eo differl. Habitu in memoriam revocans Th. (Leptotrema) 

 Bahianum Ach. var. ohtiirascens 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. scyphulifeniin (Ach.) Fr., Syst. Orb. Veg. (1825), p. 268; 

 Wain., Etud. Lich. Bres. II, 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. L. deininiiens (Nyl.) Wain. Lecidea premnea f. deminuens Nyl., 

 Fl. 1867, p. 373 (conf. infra), Syn. Lich. Nov. Cal. (1868), p. 54; Norrl., 



