OF TENTACLES OF RORIDULA. | 97 
EXPLANATION OF THE FIGURES IN PLATES 
XX. and XXI. 
Illustrating Mr. A. Ninian Bruce’s Paper on the Tentacles of Roridula. 
The following references apply to all the figures :—A. Sp., Air-spaces ; 
B. S., Bundle-sheath ; C. C., Central row of cells ; Ch., Chlorenchyma ; Cr., 
Crystals ; E.C., Empty cells ; Ep., Epidermis ; Gl., Gland; L., Leaflet; M., 
Midrib; M. Vv, Marginal vein; P., Pedicel; Ph., Phloem ; ‘Sch, Giclee: 
chyma ; St., Stoma; S. T., Spiral tracheids : as Tentacle ; ant Te rminal 
tentacle ; U. h., Unicelidiar hair; V. B., Vascular bundle; X., Xylem. 
PLATE XX. 
FIGS. I-1 BH —foridula Gorgonias, Planch. 
F1G. 1 eaf. 
FIG. 2. eae of lea 
F1G. 3.—Scheme of deaf i in transverse section to show position of marginal 
tentacles. 
FIG. 4.—Upper surface of base of leaf. 
Fic. 5.—Under surface of base of leaf. 
F1G. 6.—Portion from middle of leaf to show venation. 
FIG. 7.—Stoma of leaf in surface view 
Fic. 8.—Stoma of leaf in vertical section. 
FIG. 9.—Under side of leaf showing distribution of lime-oxalate crystals. 
FIG. 10.—Upper side of leaf showing distribution of lime-oxalate crystals. 
Fics. 11-15.—Leaf in transverse section at intervals from base to apex. 
Fics. 16-22.—Roridula dentata, Linn. 
FIG. 16.—Leaf. 
PLATE XXI. 
FIG. 17.—Leaf lobe. 
Fic. 18.—Upper surface of leaf. 
Fic. 19.— Under surface of lea’ 
FiG. 20.—Portion from middle of leaf showing venation. 
F1G. 21.—Leaf in transverse section. 
FIG. 22.—Lateral leaf-lobe in transverse section. 
FIGS. 23-31.—Tentacles of Roridula. 
FIG. 23.—Large tentacle. 
F1G. 24.—Pedicel of large tentacle in transverse section. 
FiG. 25.—Head of large tentacle in longitudinal section. 
Fic. 26.—Head of large tentacle in transverse section. 
Fic. 27.—Medium-sized tentacle. 
F1G. 28.—Head of medium-sized tentacle in transverse section. 
FIG. 29.—Small tentacle. 
