The Australian affinity is illustrated by the large number of 
193 absolutely identical species, and by the fact that upwards of 
240 of the 282 New Zealand genera are Australian, and of these 
more than fifty are all but confined to these two countries. New 
Zealand, however, does not appear wholly as a satellite of Australia 
in all the genera common to both, for of several there are but few 
species in Australia, which hence shares the peculiarities of Now 
Zealand, rather than New Zealand those of Australia: this is the 
case with Pittosporum, Coprosma , Olearia, Celmisia, Forstera , Gaul- 
therm, Dracophyllum , Veronica, Fagus, Dacrydium and Uncinia, of 
which there are comparatively few species in Australia and America; 
on the other hand, Stackhousiece , Pomaderris , Leptospermum , Exo- 
carpus, Personia, Epacris, Leucopogon, Goodenia, and a few other 
large Australian genera arc very scantily represented in New Zea- 
land. If the number of plants common to Australia and New Zea- 
land is great, and quite unaccounted for by transport, the absence 
of certain very extensive groups of the former country is still more 
incompatible with the theory of extensive migration by oceanic or 
aerial currents. This absence is most conspicuous in the case of 
Eucalypti and almost every other genus of Myrtacece, of the whole 
immense genus of Acacia and of its numerous Australian congeners, 
with the single exception of Clianthus, of which there are but two 
known species, one in Australia and the other in New Zealand and 
Norfolk Island. Considering that Eucalypti form the most preva- 
lent forest feature over the greater part of South and East Australia, 
rivalled by Leguminosce alone , and that the species are not parti- 
cularly local or scarce , and grow well wherever sown , the fact of 
their absence in New Zealand cannot be too strongly pressed on 
the attention of the botanical geographer , for it is the main cause 
of the difference between the floras of these two great masses of 
land being much greater than that between any two equally large 
contiguous ones on the face of the globe. If no theory of trans- 
port will account for these facts , still less will any of a gradual 
variation of originally identical species. 
With South America, New Zealand has 89 species and 70 genera 
Ilochstetter, New Zealand. 9 
