294 LIOHENES ANTILLARUM A W. R. ELLIOTT COLLECTI. una cum Lecidea variabili, cet. Habitu subsimilis est T. hrasiliensi Nyl. Gonidia hymenialia nulla. Gonidia thalli protococcoidea, simplicia. 5. T. (subg. EuTHELENELLA SGct. Microgl^na) geminella (Nyl.) Wain. Verrucaria Nyl. Exp. Pyrenoc. 40; Fl. 1858, 381. Poly- blastia Miill. Arg. Lich. Beitr. n. 47 (gemella), 490. Ad corticem arboris in Chateau Belair in St. Vincent (n. 446). Perithecium integrum, fuligineum, depressum. Paraphyses ramoso-connexas. Nucleus iodo non reagens. Sporas decolores, 2n8e, halone indutae, murales, long. 0-036-0-040, crass. 0016-0-020 millim. 8. PORINA. 1. P. dominicana, sp. n. Thallus crassitudine mediocris aut sat crassus, areolatus vel rimoso-areolatus, areolis contiguis, angu- losis difformibusque, circ. 1*5-0*5 millim. latis, lasvigatis, nitidi- usculis, argillaceo-pallidis, hypothallo indistincto. Apothecia thallo immersa, macula parva nigricante indicata aut verruculas parvulas, parum elevatas, tballo obductas, interdum formantia. Perithecium albidum, apice nigricans. Nucleus iodo non reagens. Paraphyses simplices aut pr. p. parce ramoso-connexas. Asci clavati. Spor^ 8n8e, decolores, fusiformes, apice superiore obtuso, apice inferiore caudato-attenuato, long. 0*035-0*038, crass. 0*005-0*007 millim., 8-9-septat8e, loculis cylindricis. Stratum corticale thalli et amphi- thecium iodo vinose rubens. In rupe ad Bath Estate in Dominica, una cum Placodio diplacioide et Lecanora prosecha. Cum F. Ton- duziana Miill. Arg. Lich. Costar. ii. 167, P. pelochroa Miill. Arg. Lich. Beitr. 647, et P. caUosa (Krempelh.) Fl. 1876, 526, com- paribus,^ at ab iis bene differens. Ad sect. Segestriam (Fr.) Wain. Etud. Bres. ii. 220, pertinet. 2. P. MASTOiDEA (Ach.) Mass. ; Wain. :Etud. Bres. ii. 221. Ad corticem arborum in Morne Couronne in Dominica (n. 164) et ad Chateau Belair in St. Vincent. 3. P. PH^KA (Ach.) Miill. Arg. Lich. Beitr. n. 872. Verrucaria Ach. Syn. Lich. 88 (secund. herb. Ach.) ; Nyl. Lich. Exot. 233 ; Hue, Lich. Exot. 296. Thallus tenuis, sat l^vigatus, nitidiusculus, glaucescens aut olivaceo-glaucescens, hypothallo indistincto. Apo- thecia conceptaculis pycnoconidiorum crebris immixta, verrucas hemisphsericas vel conoideas, 0-2-0*25 millim. latas, cinereo-nigri- cantes, opacas, basin versus amphithecio thallino obductas, parte superiore majore minoreve amphithecio evanescente obvelatas, formantia. Perithecium elevato-hemisphaericum, fuligineum, in- tegrum, at basi tenue et dilutius coloratum. Paraphyses simplices. Asci cylindrici. Sporae 8n8e, monostichae, decolores, ovoideo-fusi- formes, 1-septatae, medio baud constrictas, halone nullo indutae, long. 0*008-0*009, crass. 0*002-00025 millim. Pycnoconidia long. 0*007, crassit. 0*0015, oblonga, vulgo 3 guttulas oleosas continentia. Conceptacula circ. 0*110 millim. lata, hemisphaerica, fuliginea, Integra. Ad corticem arboris in Kingstown in St. Vincent. Etiam in specimine originali in herb. Ach. apothecia conceptaculis pycno- conidiorum immixta sunt.
