REV. W. A. LEIGHTON ON THE LICHENS OF CEYLON. 169 
88. T. CAVATUM, Nyl., var. confertum, Nyl. 
South of the Island. 
Paraphyses distinctæ, iodo lutescentes; spore 8, incolores, iodo cærulee obscuratæ ; hypothecium nigrum 
carbonaceum. 
Plate XXXVII. fig. 90. 
89. T. SUBCONCRETUM, Leight., n. sp.: thallus albido-glaucescens, cartilagineus, crassissi- 
mus, irregulariter effusus, levigatus, minute albido-g lato-innato-[ tatus ; 
apothecia sparsa, parum prominentia, immersa, ostiolo minuto perforato aperto, 
margine thallino erassiuseulo tumido, margine proprio integro crassiusculo tumido 
concreto ; diseus planus, fuscus ; spore 8, oblongæ, primo incolores, 1-septatæ, cellu- 
lis irregulariter nucleolatis, tandem nigro-fusce, septo cellulisque obscuratis, iodo 
non tinctæ. 
Central Province. 
Paraphyses distincte, iodo leviter lutescentes. 
Plate XXXVI. fig. 4. 
90. T. PAPILLATUM, Leight., n. sp. : thallus pallide lutescens, leevigatus, tenuis, subniti- 
dus; apothecia minuta, parum fusco-papillata, ostiolo minutissimo punctiformi, 
aperto, margine thallino crassiusculo pallide-fusco integro, margine proprio albido- 
farinoso convergente; spore 8 ?, incolores, elongato-oblonge aut ellipsoideæ, 6-8-cel- 
lulosæ, mediocres, iodo violacee aut fusce tinctee. 
Central Province. 
Paraphyses confertæ, distinctæ, iodo non tincte. 
Plate XXXVI. fig. 5. 
91. T. EXANTHISMOCARPUM, Leight., n. sp.: thallus albido-fuscescens, irregularis; apothecia 
prominentia, plano-depressa, albo-pulverulenta, maxime dilatato-aperta, margine 
thallino erecto crasso irregulariter granulato-lacerato furfuraceo vel pulverulento, 
margine proprio a thallino omnino libero atque discreto ceraceo connivente, radiato- 
lacerato aperto; discus planus aut subconcavus, albo-glauco-pruinosus ; spore 8, 
maxime, cylindrico-fusiformes, incolores, multi(27)-cellulosæ, iodo violacee tinctæ. 
Central Province. 
Species maxime singularis et nullis aliis speciebus cognitis confundenda. Perithecium thallinum iodo 
cærulescens at non proprium. Perithecium thallinum primo clausum, deinde stellatim lacero-dehi- 
scens persistens. Paraphyses distinctæ, iodo lutescentes. 
Plate XXXVI. fig. 6. 
92. T. ELACHISTOTERON, Leight., n. sp.: thallus pallide lutescens, minute granulato-rugo- 
sus, subnitidus, margine nigricante irregulari limitatus; apothecia minutissima, pro- 
minentiis granularibus immersa, ostiolis minutissimis numerosis apertis, margine 
thallino crassiusculo elevato albido, margine proprio albido membranaceo promi- 
