100 ORIGIN OP LIFE IN AMERICA 



evidences can only be due to the fact that a portion of the 

 Pacific coast of North America was connected by land in Mio- 

 cene times with Sakhalin and Japan, whereas the " Kuro- 

 shiwo " flowed northward between these islands and the main- 

 land of Asia. In the subsequent chapters the evidence which 

 has led me to these conclusions will be more fully dealt with. 



