1 68 Origin of the British Flora. 



Pteris aquilina, L. 



Though often stated to occur in a fossil state I have 

 seen no undoubted specimens in Britain. 



Recorded from South Sweden (Gunnar Andersson). 



Athyrium Filix-fcemina, Roth. 



Unknown fossil in Britain. 



Recorded from the Oak Zone in Gotland (Gunnar 

 Andersson). 



SCOLOPENDRIUM VULGARE, Sm. 



Found in calcareous tufa of doubtful age at Dursley, in 

 Gloucestershire. 



LASTR.EA THELYPTERIS, Presl. 



Unknown fossil in Britain. 



Recorded from the Oak and Spruce Zones in South 

 Sweden (Gunnar Andersson); and from Klinge bei Cottbus, 

 in Prussia (Carl Weber). 



OSMUNDA REGALIS, L. 



Neolithic : — 



' Submerged forests ' near Liverpool. 



Preglacial (Cromer Forest-bed) : — 



Common at Mundesley, Norfolk ; rare elsewhere. 



Equisetum palustre, L. 

 Unknown fossil in Britain. 

 Recorded from Honerdingen, in Hanover (Carl Weber). 



