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. 



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

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

 ODONTOSCHISMA. Plant of O. Sphagui; parts of stems, one bearing 



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



a capsule, elaters, and spores. 

 LEJEUNEA. Plant of L. clypeata; perianth with capsule and iuvolucral 



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



with underleaves; elaters and spores. 

 FRULLANIA. Plant of F. Asagrayaiia; two pairs of leaves seen from 



above, and from below with uuderleaves 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 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 



with involucral leaves ; capsule, elater, and spores. 

 BAZZ ANIA. Plant of B. trilobata ; two pairs of leaves with underleaves 



and $ 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 with 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. 



KANTI A. Plant of K. Trichomanis ; leaves and underleaves ; hairy invo- 

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



and spores. 



