_b._ Teeth 16, in pairs, plane, reflexed when dry.
SPLACHNUM (65). Caps. sub-cylindrical or ovate, on a very large spongy coloured apophysis; teeth lanceolate oblong obtuse, plane, yellowish; calyptra small, entire or lacerated at base. Infl. generally dioicous; barren, fl. capituliform, naked or with small scattered leaves. 133.
_c._ Peristome a conical plicate membrane.
DIPHYSCIUM (41). Caps. very large sessile, oblique ovate, gibbous; calyptra small, entire at base, scarcely covering the conical lid. 99.
_a._ Calyptra inflexed at base, at first conico-mitriform, caps. clavato-pyriform; teeth 16 or 32 plane, more or less paired, with a medial line.
DISSODON (68). Caps. oval, with a long solid tapering neck, lid conico-convex, obtuse, teeth 32, united into eight bi-geminate teeth, or into 16 pairs, linear-lanceolate, incurved when dry; leaves obtuse entire. Infl. monoicous or synoicous, barren fl. gemmiform. 134.
TAYLORIA (67). Caps. with a long clavate or sub-pyriform neck; teeth 16, or 32 cohering in pairs, reflexed when dry; leaves acuminate serrated. Infl. monoicous; barren fl. capituliform. 134.
* Teeth in eight pairs, reflexed when dry.
TETRAPLODON (66). Caps. with a solid clavate or oval apophysis wider than itself; leaves loosely reticulated, acuminate. Infl. monoicous, barren fl. gemmiform or capituliform, 3–5–leaved. 134.
ZYGODON (37) (partly). Caps. erect, pyriform, striated, apophysate. Perist. double, single, or absent; outer teeth 32 united two or four together, representing 16 or 8 plane teeth, inner of 8 or 16 cilia, alternating; calyptra small cucullate smooth oblique, lid obliquely rostrate; leaves minutely dotted. 97.
* * Teeth 16 equidistant, simple, or nearly so.
‡ Caps. pyriform or oval, erect or inclined.
ENTOSTHODON (58). Caps. erect, pyriform, symmetrical; lid plano-convex, teeth short and broad triangular; calyptra inflated below, cucullate; leaves loosely reticulated. 127.
MIELICHHOFERIA (53). Caps. pyriform, inclined or horizontal, on a slender curved seta; calyptra small, not inflated; teeth longer, linear-subulate, confluent and dilated at base. 124.
BLINDIA (13). Caps. roundish, turbinate-erect; teeth 16 lanceolate, remotely barred, entire or perforate, sometimes cleft; calyptra angular at base, afterwards cleft on one side; seta short; perennial cæspitose. 39.