THE PRE- ADAMITE EARTH. 



age, and which preceded the first Tertiary period, will be clearly 

 perceived by comparing those parts of the map (fig. 181), which 

 we have here indicated, with the parts of the map (tig. 172, 

 numbered 22.) 



SECO:Nf> TEETIAEY PEKIOD. 



481. The animal and vegetable world of the first period was 

 swept awny by the convulsion produced by the elevation of the 

 chain of the Pyrenees, which was attended with a general per- 

 turbation of the whole surface of the globe. The date of this 

 convulsion is identified with the first Tertiary period by the fact 

 of the nummulitic strata which were deposited during that period 

 being found dislocated along the entire extent of the Pyrenean 

 range. The same dislocation elevated the tract of Bray in France 

 and the country round Boulogne, both of which were submerged 

 by the Anglo-Parisian sea. Parts of Surrey and Sussex in Eng- 

 land, including the Wealden, were raised at the same time. 



The second Tertiary stage includes the London clay of English 

 geologists, the fresh- water and marine formation of Morris, a 

 part of the eocene of Lyell, the blue clay of Bracldesham, the 

 arenaceous limestone of Bognor of Mantell, and the calcareo-arena- 

 ceous system of Galeotti. 



482. The following is the generic synopsis of this period : 



Synopsis of the Animal Kingdom (exclusive of Annulata) during the 

 Second Tertiary Period. 



With the addition of five genera of Crustacea, the total number 

 of genera ascertained to have existed in this period was, therefore, 

 332, of which 116 appeared for the first time in the world. 

 126 



