484 
Willis,* — On the Floras of Certain Islets . 
Again a steadily increasing percentage, bearing out the prediction. 
Further, one will expect the proportion of wides, which on the whole 
are older, to increase relatively to that of endemics as one goes outwards 
from New Zealand to the Solanders. 
Table IV. 
Occur in 
Wides, 
Endemic ( N.Z . 
New Zealand 
301 or 23 % 
1000 
Stewart 
129 or 34 % 
240 
Islets 
2 1 or 35 % 
49 
Solanders 
6 or 40 % 
9 
If the ferns be included, the result is more clearly marked. 
It is thus clear that for restricted areas like New Zealand and its neigh- 
bouring islands age and area can be relied upon to explain the general 
composition of any of the floras that occur ; and in our next paper we shall 
go somewhat farther afield, endeavouring to trace the invasions of New 
Zealand from Indo-Malaya. 
