Deposits containing Fossil Plants. 83 



upper freshwater bed is a thin seam of lacustrine clay, full 

 of seeds of aquatic and marsh plants. The flora of this 

 deposit is so uniform at most of the localities, that it is 

 needless to repeat the list. 



Above the Forest-bed lies an Early Glacial flood-loam 

 or loess- like deposit containing bones of a Spermopliilus 

 and leaves and seeds of Arctic plants, the species being : — 



Hippuris vulgaris. Salix polaris. 



Still higher, and cutting through the boulder clay, is 

 seen an old river channel, subsequently silted-up with 

 Alluvial mud containing remains of the water-tortoise 

 (Emys lutaria), shells of Hydrobia marginata, and plants, 

 the species observed being Nuphar luteum, Ceratophyllum 

 demersum, and Salix. This deposit is probably equivalent 

 to beds D and E at Hoxne, and is here provisionally 

 classed as Interglacial. 



Northampton. 



An Alluvial deposit of uncertain age yields the 

 following plants, sent to me by Mr. H. N. Dixon: — 



Nuphar luteum. Polygonum. 



Stellaria media. Mercurialis perennis. 



Prunus spinosa. Alnus. 



Padus. Corylus Avellana. 



Sambucus nigra. Ouercus Robur. 



Ostend, Norfolk. 



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

 41-43, 62-65, Mem. Geol. Survey. 1882 ; ' Pliocene Deposits 

 of Britain,' pp. 171, 195, ibid. 1890.) 



Two distinct plant-bearing deposits are here repre- 

 sented. The older belongs to the Preglacial Cromer 

 Forest-bed, and contains cones of Picea excelsa and fruits 

 of Trapa nutans. The newer is Early Glacial, contains 



