Former Distribution of British Plants. 1 2 1 



Myriophyllum spicatum, L. . 

 Neolithic : — 



Lacustrine deposits of the Scottish Lowlands, Gayfield, 

 Cowden Glen ; Megaceros-marls of Ireland. 



Late Glacial: — 



Hoxne, Suffolk (bed C); Corstorphine ; Dronachy, Fife; 

 Close y Garey, Isle of Man (bed C). 



Interglacial : — 



West Wittering, Sussex ; Endsleigh Street, London ; 

 Hitchin, Hertfordshire (?) ; Southelmham, Suffolk ; Kil- 

 maurs, Ayrshire. 



Early Glacial : — 



Beeston, Norfolk (3 doubtful fruits). 



Preglacial (Cromer Forest-bed) : — 



Cromer, Overstrand, Sidestrand, Mundesley, in Norfolk ; 

 Pakefield, in Suffolk. 



Myriophyllum alternifolium, L. 



Unknown fossil in Britain. 



Recorded from the Pine Zone (Neolithic) in Sweden 

 {Gunnar Andersson). 



Trapa natans, L. 



Preglacial (Cromer Forest-bed) : — 



Sidestrand, Mundesley, Ostend (Norfolk) ; Pakefield, in 

 Suffolk. 



This plant does not occur in Britain in deposits later 

 than the Cromer Forest-bed. In Scandinavia, however, it 

 is common in Postglacial peaty deposits, extending also 



