fitton's section at atherfield. 325 



To each of these French sections I have annexed, in colours, what 

 I suppose to be the equivalent portions of our subcretaceous groups ; 

 and I shall now subjoin a list of some of the fossils obtained by my- 

 self at Vassy, which correspond to those of Atherfield, for the names 

 of which I am in part indebted to M. D'Orbigny ; adding to these a 

 similar list from Auxerre, of specimens collected by M. Lajoye, and 

 entrusted to me by my friend M. Constant Prevost. 



The proportionate thickness of the sections above-mentioned stands 

 thus, approximately : — 



Gault. L.G.S. Total. 



At Atherfield 100 .... 800 900 



Hythe 126 407 .... 533 



Vassy 66 .... 200 .... 266 



M. Leymerie's di-1 ,-^^7 ^.f-n nf-a 



4.-/ 4.1, \ \. r 100.^ .... 556 .... 656 



strict on the Aube J 



The subjoined list of fossils, from the neighbourhood of Vassy, is 

 taken from specimens collected by myself, under the direction of 

 M. Cornuel, near that place, principally from the Marnes and Cal- 

 caires a Spatangus, and at one of the quarries where the miniere 

 (oolitic iron ore) is dug for the manufacture of iron. 



There seems to be no doubt of the identity of the tract which 

 affords these fossils with that of the Kentish limestone near Hythe. 



Species from the "Calcaire a Spatangus" near Vassy ; found also 

 near Atherfield. 



Area Gabrielis. Nautilus (radiatus }). 



securis. Panopaea Prevostii. 



Astarte gigantea. Neocomiensis. 



numismalis } Pecten interstriatus. 



Gervillia aviculoides. quinquecostatus*. 



Gryphaea sinuata. Pholadomya gigantea. 



— — (var.) subsinuata. Plieatula placunaea } 



(var.) faleiforrais. Serpula filiformis. 



(var.) aquiUna. Spatangus retusus. 



(var.) dorsata. Spondylus Roemeri ? 



Lithodomus. Terebratula suborbicularis. 

 Natica praelonga. 



Species from the quarries of '* Miniere'* (oolitic iron o?'e) near Vassy. 



Astarte numismalis. Littorina rotundata, Sow. 



Cardium peregrinosum. Mactra ? 



Voltzii. Mya plicata, Forbes. 



Cerithium. (not known). 



Corbis corrugata {Sphcera, Sow.). Natica laevigata, d'Orb. 



Cyprina (spec, unknown), d'Orb. Cornueliana, d'Orb. 



rostrata. Pholadomya (Prevostii) Neocomiensis, 



Isocardia Neocomiensis. d'Orb. 



* This species is inserted here and in some other places with doubt, M. d'Or- 

 bigny being of opinion that Pecten quinqiiecostatus does not occur in the lower 

 greensand ; and also that P. orbicularis of this deposit differs in some of its cha- 

 racters from the species described under that name by Mr. Sowerby. See Pa- 

 lasont. Francaise, torn. iii. p. 590. — M. 



