(146) 



Fig. 9. Upper stem leaf, X I2 - 



Fig. 10. Cells of basal angle, X 285. 



Fig. ir. Part of annulus, X 285. 



Fig. 12. Cells near middle of capsule, X2S5. 



Fig. 13. Perigonial leaf and antheridium enlarged. 



Fig. 14. Stoma, X 285. 



Pirate 16. Bryobrittonia pellucida. 



Fig. 1. Plant about natural size. 



Fig. 2. Upper stem leaf, X 8. 



Fig. 3. Lower stem leaf, X 8. 



Fig. 4. Cross section of leaf, X 160. 



Fig. 5. Cross section of stem, X 160. a, section of costa at point where 

 it joins stem ; b, a radicle growing out from s-tem ; c, lower part of costa 

 •where it is wholly adnate to stem. 



Fig. 6. Apex of leaf, X 285. 



Fig. 7. Leaf cells at margin a little above the base, X 285. 



Fig. 8. Cross section of costa, X J 6o. 



Pirate 17. Bryum Dazvsonense. 



Fig. 1. Plant, natural size. 



Fig. 2. Outer perichaetial leaf, X I2 - 



Fig. 3. Upper stem leaf, X 12. 



Fig. 4. Lower stem leaf, X 12. 



Fig. 5. Inner perichaetial leaf, X 12. 



Fig. 6. Capsules, moistened, X 8. 



Fig. 7. Annulus, X 160. 



Fig. 8. Exothecal cells a little above the middle, X 160. 



Fig. 9. Stoma, X T 6o. 



Fig. 10. Peristome and part of capsule, X 160. 



Fig. n. Leaf border near middle. X 160. 



Fig. 12. Apex of upper leaf, X J 6o. 



Fig. 13. Median leaf-cells, X 160. 



Fig 

 Fig 

 Fig 

 Fig 

 Fig 

 Fig 

 Fig 

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 Fig 



Plate 18. Bryum conditum. 



1. Plant $ , about natural size. 



2. Plant 9 1 about natural size. 



3. Outer perichaetial leaf, X I2 - 



4. Upper stem leaf, X 12. 



5. Capsules showing variations in size, X 8. 



6. Lower stem leaf, X I2 . 



7. Part of annulus, X 160. 



8. Median leaf-cells, X 160. 



9. Inner perichaetial leaf with archegonium. X 12. 



10. Inner perigonial leaf with antheridium. X 12. 



11. Part of peristome, X 160. 



