April 13, 1900.] 



SCIENCE. 



571 



(4) There followed the postglacial, neo- 

 lithic, alluvial stage. 



Geographically the beginniug of the Ple- 

 istocene is remarkable for its hroad land 

 connections and it represents the last stage 

 of that community of fauna which during 

 the Pliocene distinguished the entire region 

 of Europe, Asia, Africa and North America. 

 These connections may all be restored by 



raising the continents to the 200-meter or 

 100-fathom line as shown in Chart II. The 

 mid-Pleistocene period in Europe is mainly 

 one of continental depression; (1) at the 

 climax of the first glacial advance exten- 

 sive portions of northern Europe were sub- 

 merged beneath the sea, (2) at the close of 

 the first interglacial or temperate period 

 (^Elephas antiquus stage, Pohlig) occurred 



Chart V. 



Partly Theoretical 'Divisions op European- Pleistocene, after Pohlig, Deperet, 

 Nehrinq and Others. 



