LICHENES IN INSULA TRINIDAD. 135 



17. Lecidea fuscorubescens Nyl., Not. Lich. Port. Natal (1868) 

 p. 8 (L. Natalensis Nyl. in Cromb. Lich. Challeng. Exp. 1878, p. 216). 

 Sporae long. 0.007-0.013, crass. 0.007-0.008 mm. in No. 64; long. 

 0.007-0.0010, crass. 0.006-0.007 mm. in No. 51.— L. caliginosa Stirt. 

 est autonoma species, disco metalloideo-caerulescente differens etiam 

 e speciminibus nomine L. fuscorubesccntis in Nyl. Lich. Ins. Andam. 

 (1873) p. 10 descriptis. 



Ad corticem arborum. St. Ann's Valley (No. 51). La Seiva Valley 

 (No. 64). 



18. Lecidea canoumbrina Vain. (sp. n.). Thallus crustaceus, 

 tennis, subcontinuus, subgranuloso-inaequalis, glauco-vireseens, opa- 

 cus, hypothallo albido vel indistincto. Apothecia dispersa, lat. 1.2- 

 0.7 mm., basi late adnata, parum constricta, disco depresso-convexo, 

 cinereo-rnfescente aut rufo-fuscescente subnitido, margine tenui, haud 

 prominente, fnscescente, integro, parnm conspicuo, demum excluso. 

 Hypothecium pnrpnreum aut purpureo-fuligineum, KOH non reagens, 

 superne ex hyphis erectis, conglutinatis formatum, inferne irregulari- 

 ter contextis conglutinatisque. Perithecium intus purpureum, extus 

 dilute coloratum pallidumve. Hymenium circ. 0.050-0.060 mm. 

 crassum, totum pallidum, jodo persistenter caerulescens. Paraphyses 

 arete cohaerentes, tubulo tenuissimo. Sporae 8-nae, distichae, deeolo- 

 ratae, fusiformes-oblongae, apicibus obtusis, simplices, long. 0.007- 

 0.010 crass. 0.0025-0.003 mm. 



Proxima est L. canorubellae Vain. Lich. Bras. Exs. (1892), No. 32, 

 quae sporis crassioribus et hypothecio testaceo ab ea differt. 

 Ad corticem arboris. Maraval Valley (No. 19). 



19. Lecidea cinereopallida Vain. (sp. n.). Thallus crustaceus, 

 tenuis continuus, laevigatus, glaucescens, hypothallo indistincto. 

 Apothecia dispersa, lat. 1.2-0.8 mm., basi constricta, sat late adnata, 

 disco piano aut demum leviter convexo, cinereo-pallescente pallidove, 

 parum nitido, haud pruinoso, margine sat tenui, leviter aut haud 

 prominente, impure albido aut raro subcinerascente, persistente. 

 Hypothecium inferius, albidum, ex hyphis irregulariter contextis, 

 conglutinatis formatum, pars superior intense fuscescens, KOH non 

 reagens. Perithecium albidum, ex hyphis subradiantibus aut irregu- 

 lariter contextis, sat leptodermaticis, conglutinatis, cavitatibus cellu- 

 larum oblongis aut ellipsoideis, 0.003-0.0015 mm. latis. Hymenium 

 circ. 0.100-0.110 mm. crassum, jodo persistente caerulescens. Para- 

 physes arete cohaerentes, simplices, membrana leviter gelatinosa, 



