82 Origin of the British Flora. 



* Eine Probe aus dem Torflager bei Lauenburg an der 

 Elbe,' Natunuissensch. Wochenschrift, 4th Nov., 1894.) 



The exact relation of this peat to the Glacial deposits 

 is not clear, and Professor Nathorst suggests that more 

 than one plant-bed is represented. The occurrence of 

 Brasenia suggests an Interglacial date. 



Nymphaea alba. Lycopus europaeus. 



Brasenia purpurea. Ulmus. 



Corydalis fabacea. Alnus glutinosa. 



Viola. Carpinus Betulus. 



Arenaria trinervia. Corylus Avellana. 



Tilia platyphyllos. Ouercus Robur. 



Geranium columbinum. Salix aurita (?). 



Rhamnus Frangula. Salix repens. 



Acer platanoides. Pinus sylvestris. 



Trapa natans. Picea vulgaris. 



Cornus sanguinea. Larix europaea. 



Viburnum Opulus (?). Iris Pseudacorus. 

 Lysimachia Nummularia (?). Sparganium. 



Vaccinium Oxycoccos. Potamogeton. 



Fraxinus excelsior. Carex Pseudo-cyperus. 

 Menanythes trifoliata. 



MUNDESLEY, NORFOLK. 



(Reid, ' Geology of the Country around Cromer,' pp. 36, 

 37, 83, 84, 118, 119, and folding plate, Mem. Geol. Survey, 

 1882; also 'Pliocene Deposits of Britain,' pp. 166-169. 

 ibid. 1890.) 



At this locality three different plant-bearing deposits 

 are represented. The oldest is Preglacial, and belongs to 

 the Cromer Forest-bed, which is here divisible into an 

 upper and a lower freshwater deposit, between which is a 

 mass of estuarine gravel. The lower freshwater bed 

 consists of laminated peat, full of fruits of Trapa natans, 

 but containing little else. The middle or Estuarine divi- 

 sion, contains bones of extinct mammals, much drift-wood, 

 and cones of Pinus sylvestris and Picea excelsa. The 



