AMMONITES—ZOOLOGICAL, ETC. 



345 



The species of Ammonites found in all the basin s are the 

 following : lower beds, A, fissicostatus and Milletianus ; 

 upper beds, A. Beaudanti, interruptus, Lyelli, latidorsatus, 

 mammillaris^ versicostatus. 



3rd Group. — Chloritic chalk, tufaceous chalk or upper 

 Greensand. 



The Group of the chloritic chalk is much more widely ex- 

 tended in France than the Neocomien or Gault. We find it 

 extensively developed and often of great thickness in the 

 Proven9al basin, as also in the Parisian basin, the Gulf of 

 the Loire, in the Pyrenean or south-west basin, in some 

 parts of the Jura, in the Ardennes and Cotentin. The fol- 

 lowing is a list of the species peculiar to these basins or 

 gulfs : 



A. Beaumontianus. 

 Bravasianus. 

 Deverianus. 

 Ferandianus, 

 Falcatus. 



PROVEN9AL BASIN. 



A. Largilliertianus, 

 MantelliL 

 Papalis. 

 Prosperianus, 

 peramplus. 

 Renauxianus. 



A. Requienianus. 

 Rhotomagensis. 

 Sariousianus, 



vanans. 



PARISIAN BASIN. 



A. Falcatus, 

 Mantellii. 

 Rhotomagensis. 



A. Largilliertianus. A, Lewesiensis. 

 Rusticus. WoolgarL 

 Varians, 



GULF OF THE LOIRE AS FAR AS SARTHE. 



A. Beaumontianus, A. Fleuriansianus, A, Mantellii. 

 Carolinus, falcatus, peramplus. 

 Catillus, Goupilianus. Rhotomagensis, 



