170 MESSRS. A. J, JUKES-BROWNE AND W. HILL : [May 1 896, 



Table (continued). 



Lamellibranchiata. (cont.). 



Cytherea, sp. (small) 



Cardium Hillanum, Sow 



Cyprina ligeriensis, d'Orb 



Gasteropoda. 



Avellana cassis, d'Orb 



Aporrkais, sp 



Fusus Espaillaci, d'Orb 



Natica gaultina, d'Orb , 



Pleurotomaria Archiaci, d'Orb. ., 



„ Mailleana, d'Orb. 



„ perspectiva, Mant. 



SP 



Turboidea, sp 



Cephalopoda. 



Ammonites varians, Sow 



„ „ var. Coupei, Brongn. 



„ Mantelli, Sow 



„ navicularis, Mant 



„ falcatus, Mant ... 



„ rotomagensis, Brongn 



„ cenomanensis, d'Arch. 



Hamites simplex, d'Orb 



sp. 



Turriliies costatus, Lam. ... 



„ tubercufatus, Bosc 



Baculites bacidoides, d'Orb. 



Scaphites cequalis, Sow 



Nautilus elegans, Sow 



„ subradiatus, d'Orb. 



Normandy. 



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m 





■5*g 



a 



Le 



Le 



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England. 



D E 



5 9 



VIII. Summary and Conclusions. 



It is now recognized by the Geological Survey of Great Britain 

 that the Gault and Upper Greensand can no longer be regarded as 

 separate stages or chronological divisions of the Cretaceous System. 

 To speak of ' the Gault' as a formation distinct from and older than 

 * the Upper Greensand ' is simply a mistake, for there can be no 

 doubt that what is called Upper Gault in the East of England is 



