142 Origin of the British Flora. 
EUPHORBIA AMYGDALOIDES, L. 
Preglacial (Cromer Forest-bed) :— 
Mundesley, Norfolk; Pakefield, Suffolk. 
MERCURIALIS PERENNIS, L. 
Neolithic:— 
Crossness, Essex (upper and lower peats) ; Hailes, near 
Edinburgh; Fillyside, near Edinburgh (raised beach). 
Interglacial :— 
West Wittering, Sussex. 
ULMUS MONTANA, Sm. 
Blashenwell, Dorset; Dursley, Gloucester (in calcareous 
tufa of doubtful age); Digby Fen (elm-wood recorded by 
Skertchly from a depth of 10 feet). 
Interglacial :-— 
Grays, Essex (badly preserved leaves). 
Preglacial (Cromer Forest-bed) :— 
Happisburgh, Norfolk. 
In each case the leaves are small, and more like 
U. montana than like U. campestris. The difference in 
the leaves is very slight, and I have not yet been able 
to obtain the more characteristic fruit. 
URTIca DIoIca, L. 
Late Glacial :— 
Hoxne, Suffolk (bed C) (one seed, perhaps derived from 
the bed below). 
Interglacial :— 
Hoxne, Suffolk (bed D). 
