212 K. MIYABE ON THE FLORA OF THE KURILE ISLANDS. 



niiiny of these Kamtschatkan plants Avill in the futine reach the iioithern shores of Japan, i)iohal)ly 

 tlirongh the agency of currents and migratory birds. Of such, Slellaria ruscifoUa, Swerlia lelra- 

 petala, and Urigeron salsugino.ms ( ?), from their restricted range of distribution in the northeastern 

 and eastern coasts of Yezo, wonld form good examples. 



From these observations, I agree with Professor Milne in the opinion that at the time of the last 

 great southerly migration of the rich polar tlora, Japan received her portion mostly through the isl- 

 and of Saghalin, and but little, if any, through the then uncompleted chain of the Knrile Islands. 



