38 Willis. — The Flora of Stewart Island ( New Zealand) : 
Table XI. 
Common to Stewart and Aucklands 
7 i 
species, or 
22 ^ 
' of flora of Stewart 
*5 
New Zealand and A. 
83 
6 
New Zealand 
Stewart and Chathams 
84 
27 
Stewart 
* J 
New Zealand and C. 
118 
9 
New Zealand 
Stewart and Kermadecs 
22 
7 
Stewart 
New Zealand and K. 
52 
3 
New Zealand 
That Stewart Island should have a great deal in common with the 
Aucklands might be expected, but that it should have proportionately so 
much more in common with the Chathams and the Kermadecs than has 
New Zealand, though the latter divides it from the Kermadecs, and is nearer 
to the Chathams, would never be expected on the older views as to distribu- 
tion of species. This subject will be followed up in a subsequent paper on 
the outlying islands. 
(10) On examination of the map, it will be noticed that no circle can 
be drawn to include the Chathams and Aucklands without including 
Stewart, unless it be placed with its centre in an impossible depth of sound- 
ings. Unless, therefore, the times of separation from New Zealand of 
Stewart and these islands were very different, we shall expect to find that 
all species common to the Chathams and Aucklands also occur in Stewart : 
Dicotyledons 
Monocotyledons 
Ferns 
(11) If one draw a straight line from Stewart to the Chathams, bisect 
it, and use the point of bisection as the centre of a circle whose circum- 
ference passes through the islands mentioned, then it is evident that if at 
the time of dispersal of most species there was continuous land where the 
1,000 fathom line now runs, the species common to Stewart and the 
Chathams should in general have covered this circle, or so much of it as was 
above water. The circle cuts the North Island near Lake Taupo, at about 
350 miles from the North Cape, so that, except in so far as barriers caused 
by submergence of parts of the land, or in other ways, have interfered, we 
should expect these species to range in New Zealand up to or beyond 
Lake Taupo. 
Examination soon shows that, of the 84 species common to Stewart 
and the Chathams, no less than 74 range New Zealand from end to end, 
while six more range from Stewart up to from 100 to 200 miles beyond 
Lake Taupo. This leaves only four, or less than 5 per cent, which do 
not reach the lake. These are Tillaea moschata and Veronica elliptica , 
Table XII. 
Common to Chathams 
and Aucklands. 
J 9 
13 
l 9 
5 1 
Occur in Stewart. 
19 
13 
19 
5i 
