80 
C. Warnstorf. 
Bestimmungsschlussel der untersuchten Arten. 
A. Operculum e basi plana vel convexa obliquirostre : Rhynchostegiae. 
a) Capsula deoperculata ore nuda vel membrana basilari in- 
structa Gymnostomae. 
a) Folia comalia marginibus lateralibus distincte limbata. 
1. Folia comalia superne crenulata vel dentata ; cellulae la- 
minae superiores dense verrucosae. 
* Folia late limbata. 
0 Folia tantum sursum limbata : P. austro-georgica Card. 
00 Folia circum limbata . . . . P. grata R. Brown. 
** Folia anguste limbata. 
0 Operculum perlonge aculeato-rostratum : 
P. longirostris Hpe. 
00 Operculum breviter obtuso-rostratum : 
P. marginata C. Mull. 
2. Folia comalia integerrima; cellulae laminae superiores 
leves vel disperse verrucosae. 
* Folia comalia circum peranguste limbata; costa in 
vel sub apice evanida P. pusilla C. Mull. 
/?) Folia comalia marginibus lateralibus haud vel indistinct e 
limbata. 
1. Folia comalia plerumque superne crenulata vel dentata; 
cellulae laminae superiores leves vel verrucosae. 
* Costa in foliis comalibus plus minusve excedens. 
0 Cellulae laminae superiores plerumque leves : 
P. nevadensis Card, et Ther. 
00 Cellulae laminae superiores verrucosae : 
P. antarctica Broth. 
** Costa in foliis comalibus in vel sub apice foliorum 
evanida, nonnunquam excurrens. 
0 Plantae tantum in basi rhizoideis instructae. 
A Folia comalia acuminata. 
f Costa apice foliorum evanida ; cellulae 
laminae superiores 10 — 13 ti diam., verru- 
cosae . . . P. fusco-mucronata C. Mull, 
ft Costa plerumque ante apicem foliorum eva- 
nida ; cellulae laminae superiores 20 — 30 ;i 
diam., leves vel verrucosae: 
P. Heimii Br. eur. 
