Former Distribution of British Plants. 137 



Galeopsis Tetrahit, L. 

 Roman Period : — 



Silchester, Hampshire. 



Neolithic : — 



Hailes, near Edinburgh ; Redhall, near Edinburgh ; 

 Cowden Glen, Renfrewshire. 



Late Glacial : — 



Twickenham, Middlesex. 



The occurrence of Galeopsis Tetrahit, often considered 

 to be a weed of cultivation, at Twickenham associated with 

 Reindeer, Bison, and Bos lougifrons, but not with extinct 

 mammals, suggests a transition period between Palaeolithic 

 and Neolithic. 



AjUGA REPTAXS, L. 

 Neolithic : — 



Redhall, near Edinburgh ; Hailes, near Edinburgh ; 

 Fillyside, near Edinburgh (raised beach) ; Elie, Fife ; 

 Cowden Glen, Renfrewshire. 



Late Glacial : — 



Hoxne, Suffolk (bed C) ; Hailes, near Edinburgh 

 (lower bed). 



Interglacial : — 



Selsey, Sussex ; West Wittering, Sussex ; Hitchin, 

 Hertfordshire ; Allenton, near Derby. 



LlTTORELLA LACUSTRIS, L. 

 Neolithic : — 



Redhall, near Edinburgh ; Megaceros-marls of Central 

 Ireland. 

 Late Glacial : — 



Ballaugh, Isle of Man. 



