Page:Popular Science Monthly Volume 16.djvu/485

 truly the action of the warm, dry climate of the Eocene, which succeeded the warm but humid climate of the Pliocene.

Other striking examples of these affinities of species are furnished by the laurel type (Fig. 8) and that of the ivy (Fig. 9). The large



varieties of Laurus primigenia pass insensibly into Laurus Canariensis. "It seems," says M. de Saporta, "that the narrow forms of this