102 ^^^6 Philippine Journal of Science 1913 
7. L. ATRA (Huds.) Ach. 
Luzon, Subprov. Benguet, Merrill 7993 p. p. Ad corticem arboris fron- 
dosae. 
4. PLACOPSIS Nylander 
1. P. ISIDIOPHORA Wain. sp. nov. 
Thallus crustaceus, arete adnatus, totus laciniatus lobatusque, 
laciniis circ. 1.2-0.5 mm latis, sat tenuibus, irregulariter ra- 
diantibus, contiguis, partim confluentibus, centre saepe demum 
areolato-diffractis, esorediatus, centrum versus crebre isidiosus, 
isidiis circ. 0.5 mm longis aut brevioribus, 0.1 mm crassis, cylin- 
dricis, sordide albicans, sat opacus, sat laevigatas, neque KHO 
nee CaClaOg reagens, at his reagentiis unitis leviter rubescens, 
subtus pallidus, cephalodiis prominentibus, convexis, 0.5-3 mm 
latis, integris aut demum vulgo radiatim laciniatis lobatisve, 
carneo-pallidis aut rarius cinereo-pallidis, gonidia nostocacea 
continentibus. Apothecia adpressa, basi constricta, mediocria, 
circ. 2-1 mm lata, zeorina, margine duplice, margine thallode 
tenui, integro aut crenulato, thallo concolore, margine proprio 
integro aut crenulato, sat tenui aut interdum inconspicuo disco 
concolore, prominulo aut discum baud superante, disco piano 
aut leviter concavo, pallido aut carneo-pallido aut raro cinereo- 
pallido, tenuiter pruinoso, opaco. Hypothecium cartilagineum, 
cameum aut carneo-pallidum, KHO non reagens. Hymenium 
circ. 0.16-0.17 mm crassum. Epithecium sordide carneo-palli- 
dum. Paraphyses tenues, crass. 0.001 mm, laxe cohaerentes, 
apice arctius cohaerentes crassioresque, ibi etiam ramosae. 
Asci cylindrici. Sporae 8-nae, monostichae, simplices, decolores, 
ellipsoideae, apicibus rotundatis, long. 0.010-0.019, crass. 0.009- 
0.010 mm. Gonidia globosa, diam. 0.005-0.007 mm, dilute flavo- 
virescentia, membrana tenui, distincta. 
Negros, Canlaon Volcano, alt. 1,800 m, Merrill 6876. Ad lignum vetus- 
tum. 
2. P. PAPILLOSA Wain. sp. nov. 
Thallus crustaceus, arete adnatus, totus laciniatus lobatusque, 
laciniis 0.2-0.5 mm latis, tenuibus, irregularibus, contiguis, par- 
tim confluentibus, centro saepe demum areolato-diffractis, esore- 
diatus, centrum versus crebre isidiosus, isidiis circ. 0.3 mm 
longis aut brevioribus, 0.1 mm crassis, cylindricis, vulgo ver- 
rucaeformibus, cinereus aut sordide albicans, opacus, sat laevi- 
gatus, neque KHO nee CaCLO^ reagens, at his reagentiis unitis 
leviter rubescens, subtus obscuratus, cephalodiis tubereulifor- 
mibus, circ. 0.5-0.7 mm latis, fuscis. Apothecia adpressa, basi 
constricta, mediocria, circ. 1.3-1 mm lata, lecanorina, margine 
