Br 
tissimae, hypothecio fuscescente. — Dem Arthothelium piei- 
lum Mass. und A. oasis Mass. ahnlich. : i 
Naevia mazosia Mass. sp. n. Thallus albidus hypo- 
phloeodes indeterminate dilatatus, laevigatus. Apothecia atra, 
minuta, subpunctiformia, difformia, sparsa, numerosa, disco 
plano asperulo immarginato; sporae 8, hyalinae, elongato- 
ovoideae, di-tetra-blastae (1—3 septatae), minutissimae. 
Arthothelium pieilum Mass. sp. n. Thallus glaucescens, 
uniformis, effusus, tenuis, a linea tenui obscura limitatus. 
Apothecia maculaeformi - difformia, fusco - atra, erumpentia, 
numerosa, immarginata, disco asperulo; sporae 8, primum 
ovoideae, muriformes, tandem oblongo-ovoideae (nymphae- 
formes), tetra-sex blastae (4—5 septatae), sporoblasto supe- 
riore aliis multo majore, subincoloratae, 0'033—0'36 mm. Ig., 
0'020 - 022 mm. lat., in acis amplis. 
Arthothelium oasis Mass. sp. n.: Thallus tenuis unifor- 
mis, maculam albam a linea nigra eircumscriptam in cortice 
efformans. Apothecia atra, minuta, maculae difformia, dispersa 
vel approximata, thallo innato -sessilia; sporae 8, oblongo- 
ovoideae, primum muriformes, tandem tetra-sex-blastae (A—5 
septatae), fuscescentes. 
Actinoglyphis Leprieurü Mont. Syll. p. 355 var. lep- 
tastra Mass. Apothecia typieis minora, breviora, lobato- 
divisa vel substellata, disco plano dense cinereo pruinoso. 
Sporae ellipsoideae, 6—8 loculares, fuscescentes, 0 026—028 
mm. long., 0'007—008 mm. lat. 
Chiodecton laevigatum Fee herb. Thallus sordide fla- 
vescens vel virescens, lividus, opacus, membranaceo - byssoi- 
deus, mollis, substrato adpressus, ambitu dilutius coloratus 
ibique sinuatus, subeffiguratus. Apothecia in thallo efforman- 
tia stromata thallo albiora, prominula, parva, oblonga vel 
subglobosa, solitaria vel confluentia, numerosa, punctis atris 
minutissimis consita. Sporae 8, anguste fusiformes, rectae, 
4—6 septatae, minutae hyalinae, 0'023 — 025 mm. long, 
0:004—-005 mm. lat. | | 
ß. spermogonifera. Byssocaulon -amboinense Mass. in 
eollect. fich. Amboin. Doleschallii. Der Thallus mit zahl- 
reichen äusserst kleinen, runden, weisslichen Wärzchen, die 
am Scheitel einen schwarzen Punkt tragen, besetzt. : 
Chiodecton paradoxum (Mass.) sp. n. — Arthopyrenia 
paradoxa Mass. in collect. Doleschallii. — Thallus pallide 
 virescens, tenuis contiguus, a linea nigra limitatus. Apo- 
thecia punctis minutissimis vix visibilibus, atris, gregatim 
in jugis thallinis stromatoideis dispositis indicata; sporae 8, 
late fusiformes, apieibus utrinque cuspidatis, diblastae, hya- 
linae, minutissimae, 0'011—012 mm, long., 0004—005 mm It. 
