264 
Table I. Intrusion of non-indigenous Andamans plants. 
Non-indigenous species :— 
Introduced intentionally:— 
Introduced unintentionally:— 
Prior to 1886During 1886-90 Prior to 1886 During 1886-90, 
Natura- Natura- | 
lised lised Naturalised | 
in 1866 in 1890:— in 1890 Seen in 1866 
Seen in 1889 Seen in 1889 
or 1890:— or 1890:— 
(61-3) 
II 
15. 
28, 
9. 
61. 
58. 
56. 
Total for 1866. 15 -f 61 = 76, 
Total for period 1866-90. 14-f 9-f56 = 79 . 
Total for 1890. 28-t- 9-f 58-f 56 = 151. 
During his stay in the Andamans in 1866 Mr. Kurz observed 520 
indigenous species. But he has pointed out {Report, p. 19) that this 
“ is only an approximation to the actual number existing on the is- 
“ lands. Since 1866 the number of indigenous species has been raised 
to about 600. Mr. Kurz has recorded the number of species found 
growing on 100 square yards in a suitable locality in the interior on the 
eastern side of the island and not far from Abei’deen. He shews 
{Report, p. 21) that an estimate based on this record and extended to 
the rest of the islands of the Andaman group gives scarcely more than 
600 or 700 species for the whole. At the same time, he thinks that an 
estimate of the same kind deduced from the conditions that prevail on 
the western side of the island would give quite other results, and, taking 
everything into consideration, he concludes that “ the number of really 
“ indigenous phsenogamic plants may range between 1500 and 1800 
“ species. ’ In all probability the second estimate is too high and per¬ 
haps a number nearer 1000 will be ultimately found to express the 
actual total of indigenous phanerogams. But the question need not be 
discussed here, and if in the meantime absolute records of the appear¬ 
ance of non-indigenous species be supplied, the precise proportion of 
introduced to indigenous species at various periods in the history of the 
islands can easily be ascertained when their flora shall have been com¬ 
pletely investigated. 
