332 Proceedings of the Royal Irish Academy. 
of cells. The outer coloured, the inner hyaline ; some- 
times an internal membranous peristome is present. 
A. Leaves in horizontal planes rarely vertical, 
a. Stents erect or procumbent. Fruit terminal on the main stem, or 
more rarely terminal on short lateral branches. 
* Male flowers gemmiform. 
Tribe 2. Dicrane^. 
,,3. Grimmie^. 
4. Leucobrye^. 
„ 5. Teichostome^, 
6. Orthotrtche^. 
Male flowers in discoid heads. 
Tribe 7. Ftjnarie^. 
8. Splachne^. 
9. Bartramie^. 
10. BRYEiE. 
oa. Stems creeping ; fruit lateral from the main stem, or from short side 
branches. 
b. Leaves, sometimes as many as ten-ranhed. 
Tribe 11. Hookerie^. 
bb. Leaves spreading equally, or compressed, disposed more or less in diverse 
series. 
Tribe 12. Neckere-s;. 
13. STEREODONTEiE. 
14. Hypne^. 
B. Leaves expanded distichously in two planes. 
Tribe 15. Se:itophylle^. 
3, Nematodontes. Teeth of peristome of capsule composed of fila- 
ments, sometimes free, or with teeth-like processes connected 
at their apices, or into a folded membrane. 
Tribe 16. Polytriche^. 
„ 17. BuXBAUMIEiE. 
Heterodictyi. Leaves composed of cells diverse in form, and 
also differing in the nature of their contents, some being 
chlorophyllous and narrow, others with spiral or annular 
filaments. 
Tribe 18. Sphagne^. 
Sub- order II. Schistocarpi. Capsule opening by longitudinal fis- 
sures at its sides, the segments cohering at their apices. 
Tribe 19. Andre^e^. 
