REV. W. A. LEIGHTON ON THE LICHENS OF CEYLON. 179 
Forma rotundata, Leight.: apothecia rotundata vel oblonga, margine thallino crassiore 
integro; sporæ 6-cellulosæ. 
Plate XXXVI. fig. 21. 
154. P. GEMMATA, Leight., n. sp.: thallus flavido-virescens, opacus, granulosus vel sub- 
leprosus et rimosulus, effusus; apothecia sessilia, nigra, rotundata oblonga vel dif- 
formia, lobata simplicia vel divaricato-lobata, obtusa; margine thallino albo, crasso, 
tumido, crenato; spore 8, incolores, dactyloidez, 2-septatæ; paraphyses distincto, 
iodo cærulee obscuratæ; hypothecium nigro-fuscum. 
Peradeniya. 
Plate XXXVI. fig. 22. 
155. P. AULAXERPETA, Leight., n. sp. : thallus albido-glaucescens, tenuis, lævigatus, niti- 
dus, linea fusco-nigra limitatus; apothecia nigra, innata, angustata, serpentinoidee 
flexuosa, valde elongata, apice attenuata, subeoncaviuseula, margine thallino crassi- 
usculo integro; sporze 8, incolores, elongato-oblongæ, 6-cellulosæ, iodo ccrulescentes ; 
paraphyses confertæ, distinctee; gelatina hymenea iodo lutescens ; hypothecium mar- 
ginibus supernis et basi paululum fuscum. 
Ceylon. 
Plate XXXVI. fig. 23. 
156. P. DENDROIDES, Leight., n. sp.: thallus albido-glaucescens vel olivaceus, leevigatus, 
subrugulosus, tenuis; apothecia sessilia, dendritice radiata, ramis undulatis simplici- 
bus aut uni- vel bifurcato-divisis, apicibus attenuatis, plana vel subconcaviuscula, 
glauco-pruinosa, margine thallino tenui crassiusculo; spore 4-8, incolores, dein fu- 
scescentes, oblongæ, 5-6-cellulosæ, iodo fuscæ ; paraphyses confertæ, vix distinctæ ; 
gelatina hymenea iodo lutescens ; hypothecium nigro-fuscum, basi crassum, lateribus 
tenue. 
Ceylon (South). 
Plate XXXVI. fig. 24. 
157. P. rracruosa, Leight., n. sp.: thallus albido-fulvescens, rugosus, tenuis, subnitidus ; 
apothecia nigra, elauco-pruinosa, subsessilia, subinnata, flexuosa, oblonga vel rotun- 
dato-oblonga, obtusa, confluentia, pseudo-radiatim aut dendritice disposita atque quasi 
seriatim fractuosa, margine thallino distincto integro crassiusculo; spore 8, fusce- 
scentes, elongato-oblongæ, 6-7-8-cellulosæ, iodo cærulescentes ; paraphyses distinctæ, 
iodo non tincte; hypothecium vix conspicuum, tantum paululum fuscescens. 
Central Province. 
Plate XXXVI. fig. 25. 
158. P. GALACTINA, Leight., n. sp. : thallus galactinus, lævissimus, crassiusculus, subtar- 
tareus, effusus; apothecia nigra, interruptim radiata, simplicia vel subdendritico- 
ramosa, immersa, apicibus obtusis ; epithecium concavum, fusco-nigrum, spurie mar- 
ginatum; hypothecium fuscum, lateraliter tantum decoloratum, basi crassum fuscum; 
VOL. XXVII. 2B 
