UPPEE EOCENE (bAETON AND UPPER BAGSHOT FORMATIONS). 635 



of the London basin, and he indicated on the diagram the approxi- 

 mate horizon of Mr. Monckton's " Tunnel-hill " fossils. He assured 

 Mr. Irving that they were not thrown back on genera in regard to 

 these, as the species could be determined. He allowed the whole 

 to be one series, and the changes only local, but he believed the 

 land movements to have been considerable. He thought there were 

 no subangular flints in the Pebble-bed at the base of the Barton. 



