Alps, | portions |a t Green River |Anoplotherium, Carpathians| of the |m s _Zeuglodon group |and other N. Africa | Himalaya,|a cetoides_ |forms Asia Minor| and | |presenting a Western | frontiers|p |resemblance to Thibet. | of China.|e |the fauna of | |r |that period in | |i |Europe. | |o | | |d | | | | | | | | | | | | | | | Wahsatch | | | | | | | | | | | | _Coryphodon_ | | | _Eohippus_ | | | | | | | | | | | | | | | | | | | | | | | | Laramic or Lignitic Period.| ------------------------------------------------------------------------ We learn, both from the nature of these deposits and from their organic contents, that climatic oscillations have been passing during the whole period of their deposition over the surface of the globe, and inducing corresponding fluctuations in the character of the vegetable and animal life abounding on it. A complete collation of these varying conditions at synchronous periods remains to be achieved, but the study of our own country, and those adjacent to it, shows that alternations of tropical, boreal, and temperate climate have occurred in it; a remarkable series of conditions which has only lately been thoroughly and satisfactorily accounted for.