. BAGSHOT BEDS OF BAGSHOT HEATH. 59 



sands and clays of this latter seem to replace eacli other has probably 

 been the cause of so much divergence of opinion. 



Mr. E. S. Hereies thought that the chief difficulty in the way of 

 drawing a line between the Middle and Lower Bagshots at the base 

 of the green sands was the inconstant nature of these sands. The 

 clays below them, on the other hand, were very constant and easily 

 recognized, and therefore formed a convenient line of division. 



