144 Origin of the British Flora. 



Interglacial: — 



Admiralty Offices, London ; Airdrie, Lanark. 



Early Glacial : — 



Beeston, Norfolk ; Ostend, Norfolk. 



Alnus glutinosa, Linn. 

 Neolithic: — 



Submerged peats of the Thames Valley at Tilbury 

 Docks, Albert Docks, and Crossness ; Kings Lynn ; Horn- 

 sea, E. Yorkshire; Sand le Meer, E. Yorkshire; Redhall, 

 near Edinburgh; Hailes, near Edinburgh; Fillyside, near 

 Edinburgh (raised beach). 



Late Glacial : — 



Hoxne, Suffolk (bed C'j; Hailes, near Edinburgh (lower 

 bed). 



Interglacial: — 



Grays, Essex ; Shacklewell, London ; Hitchin, Hert- 

 fordshire; Hoxne, Suffolk (beds D and E) ; Southelmham, 

 Suffolk. 



Early Glacial : — 



Beeston, Norfolk (base of Arctic Freshwater Bed). 



Preglacial (Cromer Forest-bed): — 



At most localities in Norfolk and Suffolk. 



Carpinus Betulus, L. 

 Interglacial : — 



Hoxne, Suffolk (bed D). 



Preglacial (Cromer Forest-bed): — 

 Pakefield, Suffolk. 



