"With regard to geological horizons, I have adopted, after mature 

 consideration, the following classification of the Tertiaries of 

 Europe, which is modified from the tables given hy Messrs. Gaudry, 

 Boyd Dawkins, and Max Schlosser. I have included the Pikermi 

 and Mont-Lcberon beds in the Pliocene, but have retained the 

 Eppelsheim beds, which are sometimes classed in the same division, 

 at the top of the Miocene. As regards their mammalian fauna, the 

 Eppelsheim beds seem transitional between the Pliocene and the 

 Miocene. Thus they contain Dinotherium, which is common to 

 the Middle Miocene and Lower Pliocene (Pikermi) ; and likewise 

 Rhinoceros schleiermacheri, which ranges from the Middle Miocene 

 of Sansan 1 to the Lower Pliocene of Pikermi, as well as the Middle 

 Miocene Lutra dubia 2 . Their affinity to the Lower Pliocene is 

 marked by the commencement of the genera Hipparion and 

 Simocyon, the Pikermi species of which genera are identical with 

 those of Eppelsheim. Professor Gaudry 3 is also inclined to identify 

 the Pikermi Aceratherium with the Eppelsheim A. incisivum. The 

 Eppelsheim beds do not, however, contain the highly specialized 

 Euminants of Pikermi. The probable nearness in time of the 

 (Eningen beds to 'those of Eppelsheim, and the affinity of the mam- 

 malian fauna of the former to that of the Middle Miocene of Sansan, 

 tends to connect the Eppelsheim beds with the Miocene. I have 

 discarded the term Oligocene (although its place is shown in the 

 table), as it appears to me to be an unnecessary encumbrance. The 

 Honzon beds, with which, from the occurrence in both of Hyopotamus 

 bovinus*, the Hempstead beds are associated, are placed at the 

 bottom of the Miocene, while the French phosphorites are placed at 

 the top of the Eocene, as transition beds between the Miocene and 

 Eocene. The mixture of Miocene and Eocene forms in the latter 

 deposits is shown by the circumstance that they contain species like 

 Cephalogale brevirostris 5 , Hycenodon vulpinus 6 , Anihracoiherium 

 magnum, and Hyotherium ti/pus, common to the Lower Miocene, 

 and others like Hycenodon heberti 7 , Pterodon dasyuroides, Palcto- 

 therium magnum, and P. crassum, common to the Upper Eocene. 

 The Egerkingen beds of Switzerland are placed in the Upper Eocene, 

 following in this respect the views of Dr. Max Schlosser 8 . They 



This is on the assumption that B. sansaniensis is specifically the same. 



Vide infra, p. 192. 



Les Enchaineraents, Mam. Tert. pp. 47, 51 (1878). 



Vide Geol. Mag. dec. 3, vol. i. p. 547 (1884). 



Vide infra, p. 147. e Ibid. p. 28. 7 Ibid. p. 21. 



PalEeontographica, vol. xxxi. p. 96 (1884). 



