264 LICHENES ANTILLARUM A W. R. ELLIOTT COLLECTI. 2. A. (Euarthonia) substellata (Ach.) Nyl. A. conferta (Fee) Nyl. ; Miill. Arg. Graph. Feean. 55 ; Willey, Syn. Arth. 12. Ad corticem arboris in Anguilla (n. 74 et 77 pr. p.). Thallus iodo cserulescens. Hypothecium pallidum. Hymenium iodo persistenter caerulescens, sporis vinose rubentibus. Sporse primum 3- et 4- septatae, demum 5-septata3, long. 0-014-0-022, crass. 0-006-0-007 millim., ovoideo-oblongae, cellulis 2 medianis reliquis longioribus. 3. A. (Arthoniopsis) microsticta, sp. n. Thallus tenuissimus, continuus, lasvigatus, glaucescens, gonidia phycopeltoidea continens. Apothecia sat approximata, anguloso-rotundata aut pr. p. difformia, diam. 0-25-0-1 millim., disco nigro aut fusco-nigricante, nudo, piano, opaco. Hypothecium fascescens. Hymenium 0-020-0-025 millim. crassum, parte superiore fuscescens, iodo vinose rubens. Asci pyriformes, membrana sat tenui. Sporae 8nae, decolores, ovoideo-oblong^ aut oblongae, 1-septatae, medio leviter constrictas, long. 0-008-0-010 millim., crass. 0-003-0*0035 millim., cellulis seque longis. Ad folia arboris in Dominica. A. leptospennati (Miill. Arg.) Lich. Epiph. 17, et A. aciniformi Stirt. Lich. Leav. Amaz. 7, affinis est. II. PYRENOLICHENES. 1. Verrucaria. 1. V. ^THioBOLizA Nyl. Fl. 1886, 322. Thallus tenuis, sub- continuus aut rimoso-diifractus aut subdispersus, cassio-cinereus aut caesio-glaucescens, laevigatus, sat opacus, hypothallo indistincto. Apothecia crebra, verrucas hemisphasricas, 0-3-0-25 millim. latas, atras, nitidulas, vertice convexas formantia. Perithecium fuligineum, integrum. Nucleus hemisphaericus, iodo vinose rubens aut violasceus. Paraphyses baud evolutae. Periphyses breves, simplices, parti su- periori perithecii affixae. Asci clavati. Sporas 8na3, ellipsoideae aut oblongaB aut oblique oblongae, decolores, simplices, distichae, long. 0'018-0'013, crass. 0-009-0-005 millim., apicibus obtusis aut ro- tundatis. In rupe ad Chateau Belair in St. Vincent, una cum Placodio diplacioide. Forsan est variatio F. cBthiobolce Ach. (Wain. Adj. Lich. Lapp. ii. 173). 2. Staurothele. 1. S. acarosporoides, sp. n. Thallus squamuloso-areolatus, areolis circ. 1-2 millim. latis, difformibus, angulosis aut demum sub- lobatis, adpressis, planiusculis, testaceo- aut cinereo-fuscescentibus, sat opacis, subcontiguis aut subdispersis, crassitudine mediocribus. Apothecia thallo immersa, apice nigricante baud aut leviter promi- nente. Perithecium globosum, fusco-fuligineum, integrum. Para- physes nullas. Periphyses in parte apicali perithecii numerosae, breves. Gelatina hymenialis iodo intense caerulescens. Gonidia hymenialia numerosissima, globosa aut ellipsoidea, simplicia, long. 0-002-0003, crass. 0'002-0-0015 millim., virescentia. Sporae binae aut singulae, fuscescentes, murales, long. 0-030-0-035, crass. 0-012-0-016 millim., ellipsoideae aut oblongae, apicibus rotundatis, cellulis numerosissimis. Gonidia thalli pleurococcoidea, cellulis singulis aut binis, diam.
