84 Origin of the British Flora. 
Arctic plants, and corresponds to the similar deposit at 
Mundesley, Salix polaris being abundant. The older deposit 
yields :— 
Thalictrum flavum. Alnus glutinosa. 
Ranunculus aquatilis. Corylus Avellana. 
Hippuris vulgaris. Quercus Robur. 
Trapa natans. Taxus baccata. 
Cornus sanguinea. Pinus sylvestris. 
Menyanthes trifoliata. Picea excelsa. 
Rumex maritimus. 
The Early Glacial bed contains :— 
Hippuris vulgaris. Potamogeton. 
Betula nana. Carex. 
Salix polaris. 
OVERSTRAND, NORFOLK. 
(Reid, ‘Geology of the Country around Cromer,’ and 
‘Pliocene Deposits of Britain, Mem. Geol. Survey. 1882 
and 1890.) 
At this locality the Preglacial Cromer Forest-bed is 
full of drift-wood and fir-cones, and its upper, freshwater 
division contains seeds of Crvategus Oxyacantha—a plant 
unknown elsewhere in Preglacial deposits. The other 
plants are all common to several localities and the list 
need not be repeated. 
OVERTOUN, NEAR BEITH, AYRSHIRE. 
(Craig, Trans. Geol. Soc. Glasgow, Vol. IV., p. 145.) 
Hazel nuts are here said to occur between two masses 
of till. 
OXFORD. 
(A. M. Bell, ‘On the Pleistocene Gravel at Wolvercote, 
near Oxford,’ Rep. Brit. Assoc. for 1894, p. 663.) 
A Pleistocene alluvial deposit at Wolvercote, near 
