NOTOTHYLAS.—Plants of N. orbicularis; section of the thallus through the involucre; apex of protruding capsule; lower half of capsule showing the columella; upper half of capsule; a gemma, an antheridium; twelve free spores, and two clusters of spores (4 in each).
ASTERELLA.—Plant of A. hemisphærica; ♀ receptacle viewed from above, the same from below; capsule dehiscing, with remains of calyptra at base; section of ♂ disk; an elater, a portion of same, and spores.
SPHIEROCARPUS.—Plant of S. terrestris, cluster of five involucres; involucre enclosing a capsule; capsule filled with spores; and three spores.
DUMORTIERA.—Portions of ♂ and ♀ plants of D. hirsuta; ♀ receptacle showing three involucres, two with capsules; capsule with calyptra; section of ♂ disk; elater and portion of same; spores.
AITONIA.—Plant of A. Wrightii; upper view of ♀ receptacle with three involucres; side view of same, involucre partly cut away showing capsule and remains of calyptra; a capsule closed, and dehiscent; an elater, a piece of same, and spores.
CONOCEPHALUS.—Parts of ♂ and ♀ plants of C. conicus; section of ♀ receptacle, showing two involucres and capsules; capsule with ruptured calyptra; section of ♂ disk; elaters, a portion of one, and spores.
PREISSIA.—Parts of ♂ and ♀ plants of P. commutata; section of ♀ receptacle; perianth opened showing calyptra and capsule, section of part of ♂ disk; elaters, a part of one, and spores.
MARCHANTIA.—Parts of ♂ and ♀ plants of M. polymorpha; section of receptacle; perianth, calyptra, and capsule; section of part of ♂ disk; an elater, part of same, and spores.
FIMBRIARIA—Plant of F. tenella; ♀ receptacle, and section of same; capsule dehiscing; elaters and spores.
PALLAVICINIA.—Plant of P. Lyellii, part of thallus with involucre, perianth, and calyptra; perianth cut away showing young calyptra; capsule closed, and dehiscent, antheridium enclosed in a leaf, elater and spores.