EXPLANATION OF PLATE XXIII. 



PELLIA. Plant of P. epiphylla ; calyptra with base of pedicel ; capsule ; an 



elater, part of same, two spores, and two antheridia. 



BLASIA. Plants of B. pusilla; section of cavity at the end of the midrib 

 showing young perianth and calyptra ; end of thallus with calyptra and 

 protruding capsule ; capsule dehiscing ; elaters and spores ; part of elater 

 and two spores; (J thallus with two antheridia; gemmiparous thallus 

 with two receptacles ; section of a receptacle showing enclosed gemmae 

 and the protruded orifice. 



METZGERIA. Plants ( <, 9> an( l gemmiparous) of M. furcata, and parts 

 of same enlarged ; hispid perianth with 2-lobed involucral leaf and base 

 of pedicel ; a gemma ; an antheridium ; elaters and spores. 

 ANEUR A. Plants ( <J and 9 ) of A. sessilis ; section of fleshy calyptra with 

 base of pedicel ; dehiscing capsule bearded by persistent elaters; elater, 

 part of same, and spores ; part of thallus with long deflexed recepta- 

 cles, and one cut transversely showing aiitheridia. 



FOSSOMBRONIA. Plant of F. pusilla, and a part enlarged ; capsule de- 

 hiscing, with perianth and involucral leaves ; part of stem with two leaves 

 and dorsal autheridia ; an antheridium, elaters, and spores. 

 GEOC ALYX. Plant of G. graveolens ; two pairs of leaves with uudeiieaves ; 

 part of stem with an underleaf ; section of involucre showing calyptra and 

 base of pedicel ; dehiscent capsule ; elaters and spores. 



GRIM ALDIA. Parts of $ and 9 plants of G. barbifrons ; section of 

 disk ; 9 receptacle and section of same ; dehiscent capsule ; elaters and 

 spores. 



CHILOSCYPHUS. Plant of C.ascendens; a leaf with underleaf ; a pair of 

 leaves with antheridia ; a part of stem with involucral leaves, perianth, 

 and calyptra ; dehiscent capsule ; elaters and spores. 



HARPANTHUS. Plant of H. Flotovianus, and same enlarged ; a pair of 

 leaves with underleaf ; perianth with involucral leaves, and section show- 

 ing calyptra ; elaters, a part of one, and spores. 



LOPHOCOLE A. Plant of L. heterophylla ; a part enlarged with involucral 

 leaves and perianth ; cross-section of perianth ; three pairs of leaves with 

 underleaves ; a leaf and autheridium ; an underleaf; an elater and spores. 

 CEPHALOZIA. Plant of C. multiflora; two pairs of leaves; perianth with 

 involucral leaves ; an involucral leaf ; calyptra ; capsule closed, and dehis- 

 cent ; an elater and spores. 



GYMNOMITRIUM. Plants of G. concinnatum ; three pairs of leaves ; apex 

 of stem with involucral leaves and dehiscent capsule; two involucral 

 leaves; calyptra. 



MARSUPELLA. Plant of M. emarginata; part of same with involucral 

 leaves ; involucre and perianth opened showing calyptra and base of pedi- 

 cel ; capsule ; elater and spores. 



