UPPER EOCENE (bARTON AND UPPER BAGSHOT FORMATIONS). 623 



by * in the table, we find, excluding a few cosmopolitans, that 7 

 London-Clay or Lower Bracklesham and 32 Upper Bracklesham 

 species merely straggle up into the Barton formation, only 7 or 8 

 actually belonging as much to one as to the other. There are 85 

 distinctively Lower, 39 Middle, and 50 Upper Barton species ; only 

 3 or 4 species distinctive of all 3 stages, without being distinctive 

 of any beds other than Barton ; and only 2 distinctively common 

 to the Middle and Upper stages alone. There are 13 characteristic 

 IJeadon species in the Barton and only 5 that belong equally to 

 Headon and Barton without passing into the Bracklesham. 



Vertehrata. 



The species which have all the columns 

 left blank are from the Barton 

 Series ; but their precise horizon is 

 not known. 



O 



1 



3 



1 



s 



s 

 3 



1 

 1 



P 



a 

 S 



1 



1 



1 



d 

 o 



1 



Zeuglodon Wanklyni, Seele^ 



Crocodilus, sp 



— 



— 



— 



9 



? 



*■ 



— 



Chelone, sp 



Lamna contortidens, A^ 



elegans, Aa 





Otodus macrotus, Ag 



obliquus, Ag 



Myliobates tnitidens, Ag 



goniopleurus, Aq 



toUapicus, Ag 





— 





Aetobatis rectus, Dixon 



subarcuatus, Ag 



Pristis Hastingsiae Ag 



tacutidens, Ag 



Edaphodon leptognathus, Ag 



Bucklandi 



Sphyrasnodus, sp. ined 



... 



Ccelorhynchus rectus, Eg 



Silurus Egertoni, Dixon 



Notidanus serratissimus, Ag 



1 









t Recorded by Agassiz, but not since authenticated. 



Q.J.G.S. No. 175. 



2t 



