Deposits containing Fossil Plants. 59 



Plants from the base of the Arctic bed : — 



Thalictrum minus (?). Rumex maritimus. 



Ranunculus aquatilis. Betula nana. 



Rubus Idaeus. Alnus glutinosa. 



Poterium officinale. Ceratophyllum demersum. 



Hippuris vulgaris. Zannichellia palustris. 



Myriophyllum spicatum. Eleocharis palustris. 



Galium boreale (?). Scirpus lacustris. 



Tanacetum vulgare. Isoetes lacustris. 

 Menyanthes trifoliata. 



Plants of the Arctic bed : — 



Salix polaris. 



Black Burn, East Tarbet. 



From the Clyde Beds at this place Mr. David Robertson 

 obtained seeds of Rubus Idams. The sub-Arctic character 

 of the associated marine mollusca causes these deposits to 

 be here classed as Late Glacial. 



Blashenwell, Dorset. 



(Reid, 'An Early Neolithic Kitchen-midden and Tufa- 

 ceous Deposit at Blashenwell, near Corfe Castle,' Proc. 

 Dorset Field Club, Vol. XVII., pp. 67-75. l8 97-) 



The calcareous tufa contains only recent species of 

 mammals and mollusca, with charcoal and unpolished flint 

 implements of early Neolithic type. The plant-remains 

 are impressions of leaves and twigs, with decayed wood and 

 hazel-nuts. The only determinable plants found were: — 



Ulmus montana (?). Ouercus Robur. 



Corylus Avellana. 



Bovey Tracey, Devon. 



(Pengelly and Heer, ' On the Lignite Formation of 

 Bovey Tracey,' Phil. Trans., Part II. 1862 ; Nathorst, ' On 

 the Distribution of Arctic Plants during the Post-glacial 

 Epoch,' Joum. Bot., n. s., Vol. II., p. 225. 1873.) 



