XXVli 
DESCRIPTION OF PLATE V. 
Illustrative of the Structure of Fossil Vegetables. 
Fig. 1.—Polished transverse section of silicified Monocotyledonous Wood, from 
Antigua; p. 185. 
12,—Magnified 20 times linear. 
16,—Magnified 75 times linear. 
2a,—Transverse section of silicified Coniferous Wood (Abies Benstedi) 
from the Kentish Rag, near Maidstone (Iguanodon quarry), x 120 
linear; p. 173. 
2». —Vertical or longitudinal section of the same, x 250 linear. 
3¢,—Transverse section of calcareous coniferous wood, from Willingdon, 
Sussex, x 80 linear; p. 173. 
3b,—Longitudinal section of the above, x 120 linear. 
4,—Slice of a transverse section of a recent Dicotyledonous Stem ; showing, 
1st, Pith or medullary column, occupying the centre; 2d, Four bands 
of woody layers, separated by condensed lines of elongated tissue in 
series, and having large regular openings of vessels, with numerous 
medullary rays running continuously from the central pith to the 
bark; 3d, the bark. (From Mr. Witham.) 
5.—Slice of a transverse section of a recent gymnospermous phanerogamic 
stem (of a Cycas), having a central pith, with woody layers separated 
by a condensed line, and consisting of elongated cellular tissue, 
arranged in a regular series; medullary rays and bark. (From 
Mr. Witham.) 
6.—Bundles of vascular tissue in Stigmaria ficoides, x 12 linear. See 
p. 135. 
The two strands of vessels that appear as if on the surface (and are of 
a looser texture) are part of the vascular tissue of the stem, and 
become inflected (that is, bent over), and give rise to a band of 
vessels (the darker band seen between the above), that passes towards 
the bark or cortical covering. 
