(3*0 



Plate 36. Barb id a perannulata. 



Fig. 1. Plant about natural size. 



Fig. 2. Calyptra enlarged. 



Fig. 3. Peristome enlarged. 



Fig. 4. Inner perichaetial leaf, X 2 5- 



Figs. 5, 6, 7, 8. Stem leaves, X 25. 



Fig. 9. Annulus, X 160. 



Fig. 10. Capsules, X 10. 



Fig. II. Perichaetium, X 20. 



Fig. 12. Exothecal cells at mouth of capsule, X 3°o. 



Fig. 13. Stoma, X 160. 



Fig. 14. Apex of leaf, X 3°°- 



Fig. 15. Part of base of leaf, X J 6o« 



Plate 37. Merceya latifolia. 



Fig. I. Plant about natural size. 



Figs. 2 and 3. Lower and upper stem leaves, X 8. 



Fig. 4. Cross-section of stem, X 80. 



Fig. 5. Cross-section of leaf near margin, X 205. 



Fig. 6. Cross-section of costa and part of leaf, X 2 °5- 



Fig. 7. Leaf-cells x / 3 down from apex in margin, X 205. 



Fig. 8. Apex of leaf, X 205. 



Plate 38. Bryum Williamsi. 



Fig. 1. 9 a °d $ plants about natural size. 



Fig. 2. Stem leaves, X 16. 



Figs. 3 and 4. Inner and outer perichaetial leaves. 



Fig. 5. Antheridium and two leaves. 



Fig. 6. Apex of stem leaf, X 285. 



Fig. 7. Alar region of leaf, X 285. 



Fig. 8. Marginal cells y 2 down leaf, X 285. 



Fig. 9. Part of peristome, annulus and exothecal cells, X 205. 



Fig. 10. Stoma, X 285. 



Fig. 11. Capsules, X IO - 



Plate 39. Buxbaumia Piperi. 



Fig. 1. Plants about natural size. 



Fig. 2. Capsules showing outline from above. 



Fig. 3. Leaf, X 160. 



Fig. 4- Part of peristome, X 160. 



Fig. 5- Vertical section through the upper part of capsule and peristome; 

 A, large cells forming the pseudo-annulus ; B, inner and outer peristome. 

 C, Outer wall of capsule, X 100. 



Fig. 6. $ plant, X 30a 



Fig. 7. Antheridium, X 3°°- 



Fig. 8. Stoma, X 2 85- 



