62 



THE PRESERVATION OF PLANTS AS FOSSILS. 



[CH. 



tissue. A similar instance of wood enclosed in flint was 

 figured by Mantell in 1844 in his Medals of Creation^. 



Fig. 8. Piece of coniferous wood in flint, from the Chalk, Croydon. Drawn 

 from a specimen presented to the British Museum by Mr Murton Holmes. 

 In the side view, shown above in the figure, the position of the wood is 

 shown by the lighter portion, with holes, &, h, bored by Teredos or some 

 other wood-eating animal. In the end view, below, the wood is seen as an 

 irregular cylinder to, w, embedded in a matrix of flint. \ Nat. size. 



The specimen represented in fig. 9 illustrates the almost 

 complete destruction of a piece of wood by some boring animal. 

 The circular and oval dotted patches represent the filled up 

 cavities made by a Teredo or some similar wood-boring animal. 



Fig. 9. Piece of wood from the Red Crag of Suffolk, riddled with holes filled in 

 with mud. From a specimen in the York Museum. \ Nat. size. 



1 Mantell (44), vol. i. p. 168. 



