fOURNAL. BO.VBA V NATURAL HISTORY SOCIETY, Pol. XIX. 



I'acham Island may have developed in the course ot' ;i tew u sni . 



we have only to remember fche different methods r.hsi arc I 



hv plan!-, for the purpo.se of seed-dispersal, li' this be i n 



il is difficult to see how we shall measure geologi : - the 



moment- of a flora that niav possibly be of vesterdav. 



