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 Galeopses Tetrahit, often considered 
to be a weed of cultivation, at Twickenham associated with 
Reindeer, Bison, and Bos longifrons, but not with extinct 
mammals, suggests a transition period between Palzolithic 
and Neolithic. 
AJUGA REPTANS, 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. 
LITTORELLA LACUSTRIS, L. 
Neolithic :— 
Redhall, near Edinburgh ; Megaceros-marls of Central 
Treland. 
Late Glacial :— 
Ballaugh, Isle of Man. 
