285 
On the Coniferte of Tasmania. 
and thirteen species. In Phyllocladus and Dacrydium it partakes 
of the Flora of Australia, and in Thuja that of America. 
III. America ; Podocarpus 4, Thuja 2, Araucaria 2, Juni- 
perus 1 ;? four genera and eight or perhaps nine species. 
IV. Africa ; Podocarpus 2, Callitris (Pachylepis) perhaps 3, 
Juniperus 1; ? three genera and six species; the affinity to the 
ConifercB of Australia, through Callitris, is manifest. 
From this it appears that the number of species increases in 
proceeding to the westward from the African continent in the 
southern hemisphere; and in another point of view, Australia may 
be considered the centre of their development, as they are not 
only most abundant there, but the forms of New Zealand on one 
side, and of Africa on the other, resemble more those of Australia 
than those of America, or one another. 
The Tasmanian species of Conferee, so far as is at present 
known, are peculiar to that island, and more local there than in 
any other part of the globe. If Pachylepis be regarded as a 
subgenus only of Callitris, then this island has representatives of 
all the genera peculiar to the southern hemisphere, except Arau¬ 
caria ; besides possessing the only two that are not common to 
two of the regions enumerated above. I have before considered 
Tasmania as part of the Australian region; but if we go to com¬ 
pare it with the vast country lying to the north, it will be found 
still more peculiar in its coniferous vegetation, as a part of that 
tract, than the latter as a whole was shown to be; for whilst 
Australia has only three of the genera, Tasmania has six. 
Although, in a measure, anticipating the “ Flora of Tasmania,” 
for which ample materials are in my possession for publication, 
under the authority of the British Government, I shall here offer 
a few remarks on the different species of that island, before pro¬ 
ceeding to describe the noblest of them all, the Dacrydium. 
Franklinii, or Huon Pine. 
1. Callitris, Vent. 
This genus, which was divided by Mr. Brongniart into two, 
has been further modified by Spach, who separates from both the 
North African C. quadrivalvis, for which alone Ventenat’s name 
