Former Distribution of British Plants. 121 
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 
