(146) 
Fig, 9. Upper stem leaf, 12. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
10. 
TZ: 
12. 
TS. 
14. 
I 
2 
3. 
4 
5 
Cells of basal angle, * 285. 
Part of annulus, * 285. 
Cells near middle of capsule, <’285. 
Perigonial Jeaf and antheridium enlarged. 
Stoma, 285. 
PLATE 16. Bryobrittonia pellucida. 
. Plant about natural size. 
. Upper stem leaf, « 8. 
Lower stem leaf, < 8. 
. Cross section of leaf, & 160. 
. Cross section of stem, 160. a@, section of costa at point where 
it joins stem; 6, a radicle growing out from stem; ¢, lower part of costa 
where it is wholly adnate to stem. 
Fig. 6. Apex of leaf, 285. 
Fig. 7. Leaf cells at margin a little above the base, 285. 
Fig. 8. Cross section of costa,  I60. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig 
Ss 
Fig 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
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PLATE 17. Bryum Dawsonense. 
. Plant, natural size. 
Outer perichaetial leaf, * 12. 
Upper stem leaf, 12. 
Lower stem leaf, 12. 
Inner perichaetial leaf, & 12. 
. Capsules, moistened, & 8. 
Annulus, 160. 
Exothecal cells a little above the middle, * 160. 
. Stoma, 160. 
. Peristome and part of capsule, 160. 
. Leaf border near middle. X 160. 
. Apex of upper leaf, 160. 
. Median leaf-cells, 160. 
PLATE 18. Bryum conditum. 
. Plant ¢, about natural size. 
. Plant 9, about natural size. 
Outer perichaetial leaf, & 12. 
Upper stem leaf, X 12. 
Capsules showing variations in size, & 8. 
Lower stem leaf, 12. 
. Part of annulus, X 160. 
. Median Jeaf-cells, > 160. 
Inner perichaetial leaf with archegonium, & 12. 
Inner perigonial leaf with antheridium, 12. 
Part of peristome, > 160. 
