TERTIARY MAMMAL HORIZONS. 



45 



PART II. FAUNAL RELATIONS OF EUROPE AND 



AMERICA DURING THE TERTIARY PERIOD 



AND THEORY OF THE SUCCESSIVE 



INVASIONS OF AN AFRICAN 



FAUNA INTO EUROPE 



In an address before the Academ\' 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 faiDial 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 

 |>eriod in Europe.' 



I. STRATIGRAPHICAL CORRELATION : PRELIMINARY 



LYELLS SYSTEM. 



Approximate 

 American Parallels. 



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

 Pliocene. 



