38 OBSERVATIONS ON FOSSIL VEGETABLES, 
PLATE VL. 
Tus Plate contains representations of portions of thin slices of fossil 
vegetables of various kinds, viewed by transmitted light, and, with the ex- 
ception of Fig. 9, greatly enlarged. 
Fig. 1. Fossil wood found on the beach near Whitby, by Mr Nico, 
in 1814, It exhibits distinct concentric layers, but is much broken up and 
distorted by calcareous spar. The figure represents the alteration thus pro- 
duced in the regular structure, which is evidently that of the Conifere. 
It is enlarged about fifty-five times. 
Fig. 2. Represents a portion of a longitudinal slice of part of one of the 
fossil vegetables from the Tweed, figured in Plates II. and III. The ap- 
pearance is that of the liber of many recent trees, and is similar to that re- 
presented by Fig. 19. Plate xiv. of MirBe’s EHlémens de Physiologie Vé- 
gétale. 'This figure is enlarged about fifty-five times. 
Fig. 3. Represents a portion of a transverse slice of the Wideopen tree, 
figured in Plate IV. The portion here represented is one of the most re- 
gular, and has been enlarged about 100 times. 
Fig. 4. Represents a portion of a transverse slice of a large fossil tree 
from New Holland, in the Museum of the University of Edinburgh. The 
structure is obviously similar to that of the trees represented in Plate IV. 
and therefore indicates a Conifera. This fossil, moreover, possesses very 
distinct concentric layers. I am indebted to the kindness of Professor J aME- 
SON for the fragment from which the figure has been taken. 
Fig. 5. Portion of a transverse slice of the Newbiggin tree, represented 
by Figs. 5. and 6. of Plate IV., and here enlarged about 100 times. 
Fig. 6. Represents a portion of a transverse slice of silicified’ fossil wood, 
the locality of which is unknown. It is enlarged about fifty-five times, and 
resembles the Conifere in structure. 
