(H7) 



Fig. 12. Exothecal cells just above the middle, X 160. 

 Fig. 13. Apex of perichaetial leaf, X 80. 

 Fig. 14. Cross section of upper leaf, X 160. 



Plate 19. Bryum submuticum. 

 Fig. 1. Plant, natural size. 

 Fig. 2. Outer perichaetial leaf, X 20. 

 Fig. 3. Upper stem leaf, X 20. 



Fig. 4. Iuner perichaetial leaf and archegonium, X 20. 

 Fig. 5. Capsules, X H- 

 Fig. 6. Part of aunulus, X 160. 

 Fig. 7. Apex of outer perichaetial leaf, X 160. 

 Fig. 8. Inner perigouial leaf with antheridium, X 20. 

 Fig. 9. Part of peristome, X x 6o. 

 Fig. 10. Marginal cells of leaf y z down, X 160. 

 Fig. 11. Median leaf-cells, X 160. 

 Fig. 12. Perigonium, X 10. 

 Fifj. 13. Stoma, X !6o. 

 Fig. 14. Exothecal cells about % down, X 160. 



Plate 20. Bryum suborbiculare. 

 Fig. 1. Plant, natural size. 

 Fig. 2. Outer perichaetial leaf, X 20. 

 Fig. 3. Upper stem leaf, X 20. 

 Fig. 4. Lower stem leaf, X 20. 



Fig. 5. Inner perichaetial leaf and archegoniuni, X 20. 

 Fig. 6. Capsules, X 9- 

 Fig. 7. Apex of perichaetial leaf, X 160. 

 Fig. 8. Part of peristome, X IDO - 

 Fig. 9. Stoma, X 160. 

 Fig. 10. Part of annulus, X 160. 

 Fig. 11. Marginal cells ^ down leaf, X 285. 

 Fig. 12. Apex of stem leaf, X 160. 

 Fig. 13. Exothecal cells % down capsule, X 285. 



Fig 

 Fig 

 Fig 

 Fig 

 Fig 

 Fig 

 Fi K 

 Fig 



Plate 21. Plagiobryum argenteoides. 



1. Terminal stem leaf, X 50. 



2. Terminal stem leaf, X 5"- 



3. Lower stem leaf, X 5°- 



4. Cross section of stem, X 2 °5- 



5. Apex of leaf, X 205. 



6. Base of leaf on one side, X 205. 



7. Leaf of P. Zierii corresponding to number 2, X 50. 



8. Basal cells of same corresponding to numbei 6, X 205. 



PLATE 22. Polytrichnm inconstans Higen. 



Fig. 1. Leaf, X 9- 



Fig. 2. Cross section of stem, X '6o> 



