336 Proceedings of the Royal Irish Academy. 
Teeth split to the base so as to resemble 32, 
connectedby a narrow basilar membrane, . 31. TfiiCHOSTOMUif. 
Peristome as in Trichostomum. Leaves more 
or less embracing\at base, . . . 32. Ditrichum. 
Teeth of peristome more or less spirally twisted 
and confluent into a membranous tube 
at the base, 33. Toktula.. 
aa Fruit more or less lateral. 
Sect. 4. Encalyptec^. 
Peristome wanting, 34. Ancectangitjm. 
Calyptra mitriform, inflated, entire, or cut at 
base, 35. Encalypta. 
Sub-tribe Eipaeie^. 
Calyptra conico-attenuate, split at the side, 
connected below by anastomosing processes, 36. Cinclidotus. 
Tribe 6. Oethotriche^. 
Mosses growing for the most part in close cushion-like tufts, with 
fastigiate more or less erect stems, rarely creeping. Fruit terminal 
from the main stems, or from the points of dichotomous shoots. 
Leaves many -ranked, varying from ligulate to lanceolate or linear- 
lanceolate ; areolation dense in upper portion of leaf, cellules 
roundish, papillate, lower cells large, pellucid and elongate. 
Capsules more or less pedicellate or sub-immersed among the 
leaves, 8, or rarely 16 -furrowed. Peristome single or double, the 
outer peristome of 8-16 teeth in pairs, which on separating appear 
as 32 ; inner of 8 - 16 equal cilia, or of 16 alternately shorter ones. 
Calyptra large, mitriform, more or less plicate, smooth or hairy. 
Genera. 
Calyptra mitriform, sulcate ; inner peristome of 
8-16 cilia, 37. Oethotetchuit. 
Calyptra cucullate, dimidiate ; inner peristome 
of 8 cilia, 38. Zygodon. 
Tribe 7. Punaeie^. 
Mosses with short erect stems, fertile from the apex or subsequently, 
from the apices of branches. Leaves two or three-ranked broad, 
ovate or obovate-acuminate ; areolation lax, composed of slender, 
hexagonal or rhomboidal cellules. Capsule obliquely pyriform, 
spherical or clavate, with or without a decidujus lid. Peristome 
when present single or double, of 1 6 teeth ; inner peristome a 
