EXPLANATION OF PLATE XXIV. 



SCAPANIA. — Plant of S. undulata; apex of stem with involucral leaves 



and perianth enclosing calyptra ; three pairs of leaves, a capsule, elater, 



and spores. 

 PLAGIOCHILA. — Plant of P. interrupta; five leaves; an underleaf ; peri- 

 anth enclosing calyptra ; antheridia, capsule, elaters, and spores. 

 0D0NT0SCHI8MA. — Plant of 0. Sphagni; parts of stems, one bearing 



gemmse, the other a perianth with involucral leaves ; an involucral leaf ; 



a capsule, elaters, and spores. 

 LEJEUNEA. — Plant of L. clypeata; perianth with capsule and involucral 



leaves; cross-section of perianth; part of stem with J branch; leaves 



with underleaves; elaters and spores. 

 FRULLAXL\. — Plant of F. Asagrayana; two pairs of leaves seen from 



above, and from below with underleaves and ventral lobes ; perianth with 



involucral leaves; cross-section of perianth; involucral leaf; capsule, 



elaters, and spores. 

 PORELLA. — Plant of P. platyphylla; a pair of leaves with underleaves; 



part of stem with ^ spikes; an antheridium in its leaf; perianth with 



involucral leaves and capsule ; an elater, and spores. 

 RADULA. — Plant of R. obconica; end of branch with perianth and capsule 



and lateral ^ branches ; a S branch ; an antheridium ; leaves seen from 



above and below ; a capsule, elater, and spores. 

 PTILIDIUM. — Plant of P. ciliare ; a pair of leaves ; un underleaf ; perianth 



Avith involucral leaves ; capsule, elater, and spores. 

 BAZZAXIA. — Plant of B. trilobata; two pairs of leaves with underleaves 



and (J spike; portion of ^ spike, and antheridium; capsule, elaters, and 



spores. 

 TRICHOCOLEA. — Plant of T. tomentella; leaf and underleaf; capsule; 



elater and spores. 

 HERBERTA. — Plant of H. adunca; portion Avith leaves and underleaves; 



perianth ; capsules ; elater and spores. 

 LEPIDOZIA. — Plant of L. reptans; portion with leaves and underleaves; 



antheridium in its leaf and free ; perianth with involucre ; capsule, elater, 



and spores. 

 KANTIA. — Plant of K. Trichomanis ; leaves and underleaves; hairy invo- 

 lucre, and section showing calyptra; capsule wuth spiral valves; elater 



and spores. 



