388 



Lias," Paris, 1859. The sequence of the beds from the nature 

 and manner of their deposition, does not easily, even where 

 possible, admit of separation further than what is here stated. 



SECTION TAKEN IN THE QUARKIES AT CUECY— (PAGE 8). 

 (CALVADOS DISTRICT.) 



The Liassic deposits of the basin of the Ehone, are all in 

 favour of our correlation. M. Dumoetier* thus generalizes 

 upon the fossils of the upper moiety of the Middle Lias the 

 Zone a Peden ceq^uivalvis. He reviews the fact that the 

 Belemnites which predominated in the lower portion of the 

 Middle Lias now begin to die out, with the exception of the 

 Bel. paxillosus, which lives on to the Upper beds, and one single 

 species only, the Bel. compressus, appears here for the first time, 

 and then disappears altogether. The fauna of the Ammonites 

 shows a remarkable coincidence with the Belemnites of an im- 



* Eug. Dumortier. Etudes palaiontologiques sur les Depots jurassiques du Bassin 

 du Rhone, iii^™® partie, Lias Moyen, Paris, 1869. 



