152 Origin of the British Flora. 



Unknown in Britain in later deposits. Recorded from 

 the Spruce Zone (Neolithic) in Sweden (Gunnar Andersson); 

 and from Fahrenkrug, and Griinenthal in Holstein (Carl 

 Weber) ; from Klinge bei Cottbus, Prussia (Carl Weber) ; 

 and from Honerdingen, in Hanover, associated with 

 Platanus, Juglans, &c. (Carl Weber). 



PlNUS MONTANA, Mill. 



Preglacial (Cromer Forest-bed) : — 



Determined by Heer and figured by Saporta from the 

 Cromer Forest-bed, but I can find no specimens belonging 

 to this species. Small cones of P. sylvestris may have 

 been mistaken for P. montana. 



PlNUS SYLVESTRIS, L. 

 Neolithic : — 



In 'submerged forests ' and at the base of peat-mosses 

 nearly throughout Britain and in Ireland. 



Late Glacial : — 



BoveyTracey, Devon (Heer ; ; Hoxne, Suffolk (bed C) (?). 



Preglacial (Cromer Forest-bed) : — 



Common at various localities in Norfolk, especially 

 Cromer and Happisburgh. 



The distribution in space and time of the Scotch Pine 

 is very peculiar. Abundant in the Preglacial Strata of 

 Norfolk, it has not been found in any of the Interglacial 

 Deposits in Britain, though occurring at Fahrenkrug and 

 Griinenthal in Holstein. In Late Glacial times it reap- 

 pears at Bovey Tracey, in Devon, and perhaps at Hoxne, 

 in Suffolk. During the Neolithic period it seems to have 

 been one of our commonest trees; but afterwards disap- 



