4A, CONCLUDING REMARKS. 
4. The Newbiggin tree, represented by Figs. 5, and 6, of Plate IV., and 
by Fig. 5, of Plate VI. belongs to the coal-formation. 
5. The fossil tree from near Whitby, figured in the lower part of Plate IV. 
is of the lias; as are all the following. 
6. That from near Whitby, represented by Figs. 1, and 2, of Plate V. 
7. That represented by Figs. 3, and 4, of Plate V. 
8. That represented by Fig. 5, of Plate V., and distinguished from the 
others by the regularity of its medullary rays. 
9. That represented by Figs. 6, '7, and 8, of Plate V. 
10. The fossil vegetables of the Grey Limestone, represented by Fig. 11. 
of Plate V. bi 
11. That from near Whitby, represented by Fig. 12. of the same Plate. 
12. The Egg fossil, represented by Figs. 13, and 14, of Plate V. . 
The fossils from near Whitby, represented by Figs. 9, and 10, of 
Plate V., are probably of the same species as some of those mentioned 
above ; while, with respect to that also from near Whitby, represented 
by Fig. 1, of Plate VI., it cannot be decided whether it is a different 
species or not. 
Here, then, we have of fossil plants, indisputably Conifer, at least eight | 
species belonging to the Lias, and of plants to all appearance of the same 
family, belonging to the Coal-formation or Mountain Limestone Group, 
four species. The determination of these plants is of some importance to 
geology, it having been denied that any trees of the family to which they 
belong occur in these formations. Future investigations will no doubt dis- 
close many other species. 
The determination of these fossils, then, constitutes the principal result 
of my investigations. I shall also enjoy the pleasure of having solicited the 
attention of geologists to the internal structure of fossil plants generally ; 
and, had the present work no other merit, I should feel proud of having, in 
however small a degree, facilitated the progress of my fellow-travellers up the 
steep ascent of science. Pr 
Should the subject receive the attention of some of the many eminent 
