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^a 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). 



