LIST OF PHOTOGRAPHS. 



1. Fragment of Tree Root in flint, showing part of the rotten 



interior of what had been decayed wood. (See pp. 11, 29, 

 and 30.) 



2 . Fragment of Tree Root with Fungus adhering to it, in flint. 



3. Fragment of Tree Root showing the decayed interior, and the 



outer bark partly separated from the inner w r ood, in flint. 



4. A Bean Pod, small Bulbous Root, Gourd, and Pear or Fig not 



fully ripe, all in flint. — Ibidem. 



5. Arrowy Flints. (See pp. 32, 33.) 



(1.) Two which have touched and adhered together in 

 their descent. 



(2.) One w T hich has come down upon two tabular layers 

 of flint not yet hardened, pierced through the 

 upper one, dinted out the lower, by the elasticity 

 of which it has been partly forced back, drawing 

 up the edges of the upper one with it. 



The size in each case is considerably reduced from that of the 

 specimens represented. 



