284 
Fig. 
Fig. 
MB. J. R. VAIZEY ON THE ANATOMY AND 
Pare X. 
18. Longitudinal section through the apophysis of Polytrichum commune. 
.=anterior side; p.— posterior side; th.=base of the theca; ep.— 
epidermis; s¢.=stomata; c.=cortex; c.s.—central strand. 
14. Longitudinal tangential section (a portion only) of Atrichum undula- 
tum, to show the arrangement of the cortical filaments, every fourth 
or fifth cell having a prosenchymatous end. 
15. Longitudinal section of the foot of Polytrichum commune, diagram- 
matic. c.=cortex; oc.—leptophloém ; ac.=leptoxylem; cs.=central 
strand; wo.=water-absorbing organ; ¢a.=turned-up true morpho- 
logical apex of the foot; a=point frequently referred to as apex 
of foot. 
16. Stoma of hypophysis of Splachnum vasculosum. 
17. Surface view of stoma of P. formosum. The nuclei in the cells are shown. 
18. Vertical section through the stoma of P. formosum. 
19. Stoma from hypophysis of Funaria. 
20. 
21 A series of sections vertical to the stoma of P. commune, to show 
29, the communication of the two guard-cells. st. =opening of the stoma ; 
23. g-=guard-cell , ¢.=intercellular air-passages ; c.—cortex. 
a5 } Stomata from the sporogonium of Anthoceros. 
26. Stoma of Mnium hornum. 
27. Vertical section through 25. 
Pare XI. 
28. Transverse section of the seta of Atrichum- undulatum, X300. ep.— 
epidermis ; i.=intercellular spaces in the cortex; c.sl.=cortical scle- 
renchyma ; c.p.=cortical parenchyma; sh.=parenchymatous sheath 
of the “ central strand”; 0.c.=leptophloém cylinder of the “ central 
strand” ; ac.=axial cylinder of leptoxylem of ditto. 
29. Transverse section of the seta of Polytrichum juniperinum, x 300. 
Letters as in fig. 28. 
30. Transverse section of the central strand of P. juniperinum, x 520. 
Letters as in fig. 28. 
31. Longitudinal section of apex of foot of P. formosum, 320. d, mass of 
disorganized cells at end of the foot. These cells are so much displaced 
and broken that it is impossible to draw them accurately. Other 
letters as in fig. 15. 
