EXPLANATION OF PLATE XXIV. 



SCAPANIA. Plant of 8. undulata; apex of stem with involucral leaves 

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



and spores. 



PLAGIOCHILA. Plant of P. interrupts ; five leaves; an nnderleaf; peri- 

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

 ODONTO SCHISM A. Plaut of (.). Sphagni; parts of steins, one bearing 



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



a capsule, elaters, and spores. 

 LEJEl'NEA. Plant of L. clypeata; perianth with capsule and iuvolucral 



leaves; cross-section of perianth; part of stein with g branch; leaves 



with underleaves ; elaters and spores. 

 FRULLANIA.-- Plant of F. Asagrayana; two pairs of leaves seen from 



above, and from below with umlcrleavcs and ventral lobes ; perianth witli 



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



elaters, and spores. 

 PORELLA. Plant of P. platyphylla ; a pair of leaves with tinderleaves; 



part of stem with J 1 spikes; an antlieridium in its leaf; perianth with 



involucral leaves and capsule; an elater, and spores. 

 RADULA. Plant of 1\. 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. 

 PTILIDH'.M. Plant of P. ciliare; a pair of leaves; un underleaf;. perianth 



with involucral leaves; capsule, elater, ai:d spores. 

 BAZZANIA. Plant of B. trilobata ; two pairs of leaves with underleaves 



and (J spike; portion of $ spike, and antheridinm ; capsule, elaters, and 



spores. 

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



elater and spores. 

 HERBERTA. Plant of II. 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. 



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

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



and spores. 



