6 OTTO VERNON DARBISHIRE, (Schwed. Südpolar-Exp. 



cellulares, parce curvatae aut rectae, 30 — 40x3— 4, 1/ magnae; spermogonia et soralia 

 non visa; habitat ad saxa arenacea, Falkland Islands, Port Louis. 



Notes: Although the apothecia are generally well separated we often find that 

 they have fused laterally and that the total measurement of an apothecium comes 

 to 3 — 4 mm. 



Bacidia granulosa nov. spec. 



Thallus ad 1 mm crassus, sordide albidus aut parce rufescens, irregulariter gra- 

 nulosus et margine profunde rimosus, K rubescens; hypothallus nullus distinctus; 

 apothecia nigra, lecideina, emergentia, sed primo thallo inclusa, marginata, primo 

 concava et dein convexa aut planiuscula, saepius contigua et difformia, 0.5 — 1.0 mm 

 lata; epithecium, parathecium et hypothecium carbonaceum; sporae octonae, poly- 

 seriatim dispositae, fuscescentes, 4- (et rarius 2-)cellulares, 20 — 30x8 — 15 ju magnae; 

 spermogonia et soralia nulla visa; habitat ad saxa, Graham Land, Louis Philippe 

 Penins., Hope Bay. 



Notes: It was not altogether easy to make out this species on account of a para- 

 site which infested it in great numbers. This parasite belongs to the genus Chaeto- 

 iiu'i/m and I have given it the specific name "Bacidtae". The thallus of the new 

 species of Bacidia was not well developed and the margin for example was not 

 really visible properly. But still I think that it is clearly a new species. 



Thelotrema flavescens nov. spec. 



(Plate 1, fig. 9.) 



Thallus tenuis, epiphloeodes, flavescens, nitidiusculus; Verrucae fertiles hemi- 

 sphaericae, ad 1.5 mm latae, thallo concolores; ostiolum ad 0.5 mm latum; epithecium 

 thallo concolor aut pallide rufescens; parathecium decolor; hypothecium saepius pal 

 lide obscurior; sporae octonae, polyseriatim dispositae, hyalinae, polyblastae, 85 — 10— 

 14 it magnae; habitat ad corticem arborum, Tierra del Fnego, Navarin Island. 



Notes: The chief points of distinction of this species are the yellow colour and 

 the size of the spores in connection with the fact that there are eight spores in 

 each ascus. 



Pertusaria corrugata nov. spec. 

 (Plate 1, fig. 10.) 



Thallus sat crassus, albo-cinerascens, rugoso-plicatus, incomplete rimoso-areolatus, 

 hypothallo tenuissimo sed distincto nigro instructus, K flavescens et dein intense 

 ferruginascens; apothecia primitus immersa neque dein nisi parce emergentia, disco 

 aterrimo instructa, difformia, 0.5 — 1.0 mm lata; paraphyses ramosae, 1.5 fi latae; 



