LICHENES IN INSULA TRINIDAD. 133 



mm. Gonidia pleurococcoidea, globosa, diam. 0.005-0.006 mm., 

 simplicia aut glomerulosa, membrana sat tenui. 



Subsimilis Bilimbiae sphaeroidi, sed sporis tenuioribus, thallo minus 

 evoluto et reactione hymenii ab ea differt, ad Bacidias accedens. 



Ad corticem arboris. Maraval Valley (No. 28). 



13. Bilimbia rufopunctata Vain. (sp. nov.). Thallus crusta- 

 ceus, sat tenuis aut sat crassus, continuus, verruculoso-inaequalis et 

 majore parte verruculis minutissimis (circ. 0.050 mm. latis) et granu- 

 lis soredioideis, crebris subcontiguisque instructus, glaucescens vel 

 stramineo-virescens, hypothallo indistincto. Apothecia numerosis- 

 sima crebraque, lat. 0.4-0.3 mm., basi leviter constricta, disco piano 

 aut demum convexo, rufo aut obscure rufescente, nudo, opaco, margine 

 tenuissimo, subconcolore aut paullo pallidiore, integro, demum excluso, 

 KOH solutionem rubescentem vel subroseam effundentia. Hypo- 

 thecium dilute fulvo-rubescens. Epithecium fulvo-rubescens, hy- 

 menium ceterum totum fulvescens, circ 0.040 mm. crassum, jodo 

 persistenter caerulescens. Paraphyses arete cohaerentes, simplices 

 aut parce ramoso-connexae furcataeve, membranis leviter gelatinosis 

 cavitatibus 0.0012 mm. crassis, apice saepe leviter incrassatis. Sporae 

 8:nae, decolores, oblongae aut cuneato-oblongae, rectae, apicibus 

 obtusis, 3-1-septatae, long. 0.009-0.014, crass. 0.002-0.0035 mm. 

 Gonidia pleurococcoidea, globosa, diam. 0.006-0.009 mm., simplicia 

 aut glomerulosa, membrana modice incrassata aut gelatinosa. 



Facie externa Bacidiam inundatam in memoriam revocans. 



Ad truncum putridum palmae. Four Roads (No. 48). 



14. Sporopodium Thaxteri Vain. (sp. n.). Thallus crustaceus, 

 tenuis, continuus, verruculis minutissimis (circ. 0.050-0.0S0 mm. latis), 

 intus albis crebre adspersus, stramineo- aut albido-glaucescens, sat 

 opacus, KOH flavescens, hypothallo albido, parum distincto. Apo- 

 thecia lat. 0.8-0.4 mm., dispersa, basi constricta, disco piano, tenuiter 

 pruinoso, partim demum leviter denudato et livido-rufescente, mar- 

 gine sat tenui, haud prominente, albido, opaco, persistente, glabro, 

 plus minus distincte verruculoso. Hypothecium superne rufescens, 

 inferne dilutius coloratum. Parathecium rufescens, modice incrassa- 

 tum, extus strato albido aeque crasso obductum. Hymenium 0.065- 

 0.110 mm. crassum, totum decoloratum, jodo persistenter caerulescens. 

 Paraphyses arete cohaerentes, ramoso-connexae. Sporae singulae, 

 decoloratae, oblongae, apicibus rotundatis, murali-divisae, cellulis 

 numerosissimis, long. 0.046-0.066, crass. 0.015-0.018 mm., membrana 

 modice incrassata, haud gelatinosa. 



