33. With the tertiary period commences for the Earth a new order of things. The aspect of its surface is completely changed; the conditions of vitality are profoundly modified, and approach the present state of the Earth. The first part of this period is signalized by an arrest in animal and vegetable productions. Everything bears traces of an almost entire destruction of living beings, and then appeared successively new species, the better organization of which is adapted to the locality where they are called to live.