TERTIARY MAMMAL HORIZONS. 



45 



PART 11. FAUNAL RELATIONS OF EUROPE AND 

 AMERICA DURING THE TERTIARY PERIOD 



AND thp:ory of the successive 



INVASIONS OF AN AFRICAN 

 FAUNA INTO EUROPE 



In an address before the Academy last year the various steps 

 which have been taken to secure correlation were described. 

 The work proves to be a very difficult one and is by no means 

 complete. The kind co-operation of the leading palaeontologists 

 of Europe was enlisted and as a result an approximate correla- 

 tion sheet was prepared. This was virtually a report of progress 

 in this investigation, main emphasis being laid upon geological 

 succession. In continuing the subject this year, main emphasis 

 will be laid upon faiinal succession or the distribution of the 

 different orders and families of mammals, concluding with the 

 latest views as to the succession of life during the Pleistocene 

 period in Europe.^ 



I. STRATIGRAPHICAL CORRELATION : PRELIMINARY 



lYELL'S SYSTEM. Approximate 



American Parallels. 





[UPPER. 



Post Glacial 





PLEISTOCENE. 



MIDDLE. 



Glacial & Interglacial 







LOWER. 



PREGLACIAL 



7EQUUS BEDS 





r UPPER. 



SICILIEN 



? BLANCO 



PLIOCENE. 



MIDDLE. 



(ASTIEN 

 (PLAISANCIEN 







Slower. 



MESSINIEN 



Upper Loup; Fork 





r UPPER. 



TORTONIEN 



LOUP FORK 



MIOCENE. 



MIDDLE. 

 LOWER. 



HELVETIEN 

 LANGHIEN 



Lower Loup Fork 



and 

 Upper John Day 



^ This portion of the second address is placed in its proper order above after 

 Pliocene. 



