434 
Proceedings of the Boyal Irish Academy. 
Sect. Rhynchostegium Bryol. Europ. 
Distingiiislied by the long rostellate operculum, by the position 
of the capsules, by the teeth of the peristome being dis- 
tinctly lamellated on their outer surface, by the tissue of the 
leaves being composed of long, narrow, hexagonal, rhomboidal 
areolae, and by the mode of growth. Eiirhynchium of Schimper is 
included in this section. 
Diagnosis of Species. 
Fruit-stalks smooth. Inflorescence monoicous. 
Stem creeping, branched, branches procum- 
bent ; leaves loosely imbricated, spread- 
ing, ovate-acute, margins serrate, nerve 
■ not quite percurrent, . . . . II. H. efscifoeme. 
Stem creeping, subpinnate ; leaves erecto- 
patent or sub-secund, ovate- acuminate, 
concave, nerved half way, serrulate, . 12. H. confeetum. 
Stem lax, with innovations, branched, 
branches round or sub-complanate ; stem 
leaves spreading, and sub -deltoid, ovate- 
acuminate, those of the branches im- 
bricated, all nerved two-thirds to the 
apex, denticulate ; capsule oblong, nearly 
horizontal, 13. H. megapolitanijm. 
Stem creeping, much branched; leaves 
nearly erect, imbricated, roundish-ovate, 
nerved more than half-way, . . . 14. H. murale 
Stem creeping, branches sub-erect, fascicu- 
late; leaves lanceolate- subulate, erect, 
entire, nerve percurrent, . . . 15. H. tenelltjm. 
Stem prostrate, creeping, sparsely branched ; 
leaves erecto-patent, sub-secund, lanceo- 
late, entire, nerveless, margin slightly 
reflexed, 16. H. demissum. 
Stem prostrate, pinnately subdivided ; leaves 
slightly concave and compressed, ovate, 
acute, serrulate, shortly two-nerved at 
the base ; capsule ovate-oblong, curved 
or subcernuous ; lid rostrate ; inflores- 
cence dioicous, .... . 17. H. depressttm. 
