Table XVIII. Analysis of the distribution of Wind-introduced species. 
Species present in both hemispheres :—. 21 
Cosmopolitan in the tropics {Phanerog. 3 ; Cryptog. 12) .. . 151 
Almost Cosmopolitan {Phanerog. 1 ; Gryptog. 5) . g' 
In Africa, Asia, Polynesia, America (Gryptog.) . 2 
In Africa, Asia, America (Phanerog.) . 1 
In Asia, Australia, America (Gryptog.) . 1 
In Asia, America (Gryptog.) ... . 2 
Confined to Old World :—. .. 43 
fin Africa, Asia, Australia, Polynesia (Gryptog.) .. . P 
In Africa, Asia, Australia (Gryptog.) . ] 
l^In Africa, Asia (Cryjotog.) . 1 
f In Asia, Australia, Polynesia (C)•^/p^oy.) 3 
■{ In Asia, Australia, (Phanerog.) . 2 
fin Asia, Polynesia(Crj/piogf.). 1 
Confined to Asia, (Phanerog. 18; Gryptog. 16) . 34 
Total of possibly winddntrodnced species :— . 64 
Phanerogams. 251 
Cryptogams . 391 
We thus see that 32 per cent, of the species are cosmopolitan, but 
that at the same time as many as 53 per cent, ai’e confined to South- 
Eastern Asia, figures which tend to shew that the agency of wind appears 
to be less active than Ave might expect. So far as the more local distribu¬ 
tion is concerned we find that 40 species, or 62 per cent., may have 
reached the islands either from Indo-China or from Malaya ; 10 species, or 
15 per cent., appear to be local species; 3 species appear to have reached 
the islands from Malaya and one must have come either from Malaya or 
Ceylon, these four are, however, all Cryptogams and may possibly yet be 
found in Indo-China. Even if it be assumed that these do not occur in 
Buima, it.leaves the south-west monsoon responsible for the introduction 
of only 6| per cent, of this group of species. The remaining 10 species, 
or about 16 per cent, of the class, have more probably been introduced 
by the north-east monsoon, a circumstance that might be expected, 
seeing that this monsoon blows from the direction of the nearest land. 
And as this is the case it will follow that the probability is strong that 
most of the species which may, so far as their present distribution 
indicates, have come either from Indo-China or Malaya have in reality 
come from the north-east. The only species of the kind for which this 
is doubtful is Chonemorpha macrophylla, which, though abundant in 
India and in the Himalaya, and equally so in Malaya and in the 
Andamans, has not yet been recorded from any part of Indo-China to 
the east of Khasia and Sylhet. 
The last group of introduced species—those carried by birds—has 
now to be considered. In discussing this it its necessary to distinguish 
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