144 JOURNAL AND PROCEEDINGS 



The Mesozoic period, may be subdivided also into three peri- 

 ods : (i) the Triassic, (2) the Surassic, (3) the Cretaceous. This 

 period was essentially the age of reptiles, which were then in a 

 position to call themselves the " masters" of the earth. 



The third period of the Mesozoic, vis. : the Cretaceous, is also 

 of importance as a coal-producing period, though much less so than 

 the Carboniferous. 



The last period, the Caenozoic, may be divided into (i) the 

 Tertiary, and (2) the Post Tertiary, each of which is conveniently 

 again subdivided into — 



r (a) Eocene 

 (i) Tertiary -j (b) Miocene 

 t (c) Pliocene 



( (a) Glacial epoch 

 (2) The Post Tertiary j (b) Champlain epoch 

 ( (c) Terrace epoch 



It is in the Tertiary period that mammals first appear. The 

 advent of man may be considered to be shortly after the Glacial 

 epoch in the Post Tertiary. 



