SAPORT.VS WORLD OF PLANTS. 



459 



truly the action of the warm, dry climate of the Eocene, which suc- 

 ceeded 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 



Fig. 9.-STTCCE9SIVE Modifications op the Type Eedo-a in the Course or the Tertiarj 

 Epoch : 1. Hedera pnsca. 2. H. Philibertii. 3. H. Kargii. 4. H. Acutelobati. 5. H. 2Iac- 

 auri. 6. B. Slrozzl. 



varieties of Laurus 2yrimigenia pass insensibly into Laurus Canarien- 

 sis. " It seems," says M. de Saporta, " that the narrow forms of this 



