] 7t] JOURNAL, B03IBA y NA TURA L HISTORY SOCIETy, Vol. XIX. 



Pacham Island may have developed in the course of a few centuries ; 

 we have only to remember the different methods that are employed 

 by plants for the purpose of seed-dispersal. If this be once admitted 

 it is difficult to see how we shall measure geological times by the 

 moments of a flora that may possibly be of yesterday. 



