7 
F. Willdnsoni , of the Eocene strata of Dalton, in New South Wales, which 
is related to the first just as the F. Feronice is related to the F. Deucalionis. 
As regards the relative age of the Tertiary Elora of Australia, the 
following general results may be deduced from the materials at hand : — 
The Eocene Elora of Dalton contains, amongst twenty-seven species 
of plants, only two which belong to the principal element, i.e., only 7'4 per 
cent, of characteristic plants ; but, on the other hand, 52 per cent, of species 
which indicate a tropical climate. The peculiar genera are proportionately 
much fewer than the genera common to the European Tertiary Elora, as far 
as these are at present known. The Eocene Elora of Australia, therefore, 
differs more from the present flora of that continent, and less from the 
Tertiary Elora of Europe. 
The Miocene Elora of Australia, as known from specimens hitherto 
found in different localities in New South Wales and Tasmania, contains, 
amongst thirty-two species, four which are characteristic, i.e., 12 - 5 per cent, 
of the principal element. The number of species pointing to a tropical 
climate are reduced by 34 3 per cent., so that the number of the peculiar 
genera has, in comparison with the Eocene Elora, increased. In the Miocene 
Epoch, therefore, the principal element of the flora was already more 
developed in Australia than during the Eocene Epoch. 
Of the specimens of the Pliocene Elora which have been discovered in 
several localities in Victoria and New South Wales, peculiar genera and 
species have already been described, the majority of which may be regarded 
as characteristic plants. 
The Pliocene Elora of Australia, therefore, shows a further develop- 
ment of the principal element, and is marked by a greater divergence from 
the previously existing floras. 
So that to the question first propounded above, as to the relation sub- 
sisting between the Tertiary Elora and the peculiarities of the present living 
flora, we may now reply that these peculiarities have been chiefly differentiated 
from their original forms, at a somewhat late period towards the end of the 
Tertiary Epoch, or, perhaps, at the beginning of the present epoch. This 
element, which is here the principal, but in the other Tertiary Floras only a 
