demum subslellalini dehisceus, discum planiusculum
(atrum) limbo inciso - laciniato marginans.
17. Ur c e o l a r i a Ach.
Thall us crustaceus, adnatus, uniformis. Apot
h e c ium orbiculalium, immersimi, a thallo marginatum,
(nigrum), perilhecio infero lateralique sub-
cupulari, disco piano-concavo.
18. L e c i d e a Ach. pro parte.*
Thallus crustaceus, adnatus, uniformis, vei
suLfoliaceus eifiguratus. Apoth e c i um orbicula-
lum, subsessile, in ambitii liberum, perithecio infero
cupularl nucleum marginante dlscoldeum planum
(nigrum).
19. B i a t o r a Fries.
Thal l u s crustaceus, adnatus, uniformis, vei
siihfoliaceiis eifiguratus. Apo the c ium orblcula-
luin, (coloralnm), subsesslle, e lamina discoidea
demum plana ambltu marginato subtus libero.
CohorS III. T r Y P E T H E L I ACEAE.
T h a l l u s c r u s t a c e u s . A p o t h e c i a f o rm a
v a r i a v e r r u c i s e t h a l l i s u b s t a n t i a me d
u l l a r i f o rm a t i s im m e r sa.
20. A r t h o n i a Ach. emend. *
Thall us crustaceus, adnatus, uniformis. Verruca
similaiis, gelatinosa, (nigra s, fusca), junior
f
a thallo obiecla, demum tumida diíTormls, ex ascis
infra superiiciem recondltis aspera.
21. P o r o t h e l i u m . *
Th a ll u s crustaceus, adnatus, uniformis. Verruca
subgelatinosa, (solenuiier nigra), plures fovens
núc l e o s subglobosos nudos thecigeros, sln-
gullsque ostiolis pertusa.
22. M e d u s u l a . *
Thallus crustaceus, adnatus, uniformis. Verruca
depressa, pulverulento, (alba). Apothec i a
lineari - elongata, immersa, (nigra), júniora albido-
velala, perithecio laterali plano.
23. Op h I h a lm i d i u m . *
Thallus crustaceus, adnatus, uniformis. Verruca
suhhemisphaerica, (flavesceiis). Apo t h e c ia
(unum vei plura) subimmersa, subglobosa, perithecio
supero lateralique ostioiato nucleum globosum
obtegente.
24. T r y p e t h e l i u m Spr. Ach.
Thal l u s crustaceus, adnatus, uniformis, (co-
loratus). Ve r ruc a lumidula, duriuscula, dlffor-
mis. Apo t h e c ia immersa, globosa et pyriformla,
perldieeio integro poriformi ostioiato.
25. A s t r o t h e l i u m . *
Th a l lu s cruslaceus, adnatus, uniformis, (co-
loralus). Ver ruca hemisphaerlco - conica, (colorala).
Ap o t h e c i a turbinata, immersa, perilhecio
‘Ml
if;