110 Origin of the British Flora. 
ARENARIA PEPLOIDES, L. 
Interglacial:— 
Stone, Hampshire. 
SPERGULA ARVENSIS, L. 
Neolithic :— 
Redhall, near Edinburgh. 
MONTIA FONTANA, L. 
Neolithic :— 
Fillyside, near Edinburgh (raised beach); lacustrine 
deposits of the Scottish Lowlands, Redhall, Hailes 
Broughton, near Edinburgh; Cowden Glen, Renfrewshire. 
Late Glacial :—- 
Twickenham, Middlesex; Hoxne, Suffolk (bed C). 
Interglacial :-— 
Hitchin, Hertfordshire; Hoxne, Suffolk (bed D); Allen- 
ton, near Derby; West Wittering, Sussex. 
HYPERICUM PERFORATUM, L. 
Roman Period :-— 
Silchester, Hampshire. 
Interglacial :— 
West Wittering, Sussex. 
HYPERICUM QUADRANGULUM, L. 
Neolithic (?)— 
Redhall, near Edinburgh. 
Interglacial:— 
West Wittering, Sussex. 
Preglacial (Cromer Forest-bed) :— 
Pakefield, Suffolk. 
