6o Origin of the British Flora. 



Some clays overlying the Eocene lignite deposits have 

 yielded a few Arctic plants. It is not clear whether these 

 should be classed as Early or Late Glacial. They yield : — 



Arctostaphylos Uva-ursi. Salix cinerea. 

 Betula alba. Pinus. 

 nana. 



Bridlington, Yorkshire. 



(Nathorst, * Ueber neue Funde von fossilen Glacial- 

 pflanzen,' Engler's Bot. Jahrb., 1881, p. 431.) 



A hollow in the boulder-clay, filled with peaty marl, 

 is here classed as Late Glacial from its stratigraphical 

 position and the occurrence in it of Betula nana. 



Broughton, Edinburgh. 



From a peaty deposit at this spot Mr. James Bennie 

 has recently obtained a few plants, probably of the same 

 date as those from the Neolithic deposits at Hailes and 

 Redhall. There is nothing characteristic in the list: — 



Ranunculus aquatilis. Polygonum aviculare. 



Flammula. — -. Persicaria. 



Lingua. Rumex. 



repens. Potamogeton. 



Stellaria media. Scirpus setaceus. 



Montia fontana. Eriophorum. 



Carduus. Carex. 

 Atriplex (?). 



Caerwys, Flintshire. 



(Maw, ' On the occurrence of extensive Deposits of 

 Tufa in Flintshire,' Geol. Mag., Vol. III., p. 253. 1866; 

 Strahan, ' Geology of Flint, Mold, and Ruthin,' p. 1 50, 

 Mem. Geol. Survey. 1890.) 



An extensive deposit of calcareous tufa at this place is 

 full of leaves ; but the date cannot be fixed, as the tufa 



