a short slightly inflated neck; lid conico-convex with a long slender oblique beak; stems erect, cæspitose. I39.
Sub-Div. II. Perist. single, of 16 teeth. Habrodon (77). Caps. oval-oblong erect, calyptra large, lid conical; st. sub-erect, l. spreading, nerveless, soft and opaque; per. teeth simple, linear, inserted below mouth of caps., remotely articulate: dioicous. 141. Sub-Div. III. Peristome almost single.
a. inner peristome very short and indistinct.
Leucodon (73). Caps. oval erect, on a short pedicel; calyptra large; outer teeth 16 bifid or perforate, not hygroscopic; surculi erect simple; leaves plicato-striate, nerveless. 139.
Pterogonium (78). Caps. oblong erect, on a long seta; calyptra small; outer teeth 16 simple, hygroscopic; surculi dendroid, with fasciculate curved branches; leaves not striate. 141.
Leptodon (75). Caps. oval on a very short seta; calyptra and vaginula hairy; teeth 16 linear-lanceolate, entire or fissile, not hygroscopic; surculi pinnate; branches curled when dry; leaves very obtuse. 140.
Sub-Div. IV. Peristome double.
a. Inner perist. of 16 cilia.
Antitrichia (74). Caps, oval, regular, on a short curved
