258 
name of Port Cornwallis by Lieut. Blair* in 1789, in obedience to orders 
issued in September of that year. In November 1792 orders were issued 
for the removal of the Settlement to another and more spacious hai'bour 
in North Andaman ; to this new settlement the original name Port 
Cornwallis was again applied. It is nowhere distinctly stated, though, 
considering the transfer of name from the old settlement to the new, it 
is highly probable, that old Port Cornwallis was entirely abandoned in 
1792. We know, however, that in 1796 orders were issued for the re¬ 
moval of the whole establishment to Penang. The doubtful point, so 
far as our present enquiry is concerned, is the length of time prior to 
the establishment of the present Settlement that its site was exposed to 
influences favourable for the active introduction of non-indigenous 
species. But we know that altogether these influences only existed for 
six seasons and could only have been active during three seasons ; probably 
they only existed at all during these three seasons. The present Settle¬ 
ment was commenced in March 1858 ; Mr. Kurz visited it during April- 
July 1866 ; to the eight seasons (1858-66) that had passed between the 
foundation of the Settlement and the date of that visit we must therefore 
add three more seasons (1789-92) in order to make up the whole period 
during which the non-indigenous species recorded by Mr. Kurz were 
being introduced. Even if the original site was not wholly abandoned 
in 1792 the subsequent seasons (1792-96) may be neglected without 
producing any appreciable error. Assuming, therefore, that a period of 
eleven seasons has been responsible for the naturalisation and inti’oduc- 
tion of the species in the two lists for 1866 we are able to calculate the 
rates of these processes and to compare them with the rates between 
1866 and 1890. These are shewn in the following table :— 
Table III .—Bate of Introduction of Non-indigenous Species. 
Non-indigenous species na¬ 
turalised. 
During Period I. 
Prior to 1866 (1789-92 + 
1858-66) =11 seasons. 
During Period 11. 
Bet. 1866 & 1890, (1866-90) 
= 24 seasons. 
No. 
Rate 
No. 
Rate 
of species. 
per annum. 
of species. 
per annum. 
Cultivated plants introduced 
during Period I ... 
15 
1-36 
14 
0-58 
Cultivated plants introduced 
during Period II 
9 
0-37 
Weeds of cultivation 
61 
5-54 
56 
233 
Totals ... 
76 
6-90 
79 
3-28 
* The name of the 1789 Settlement having been transferred to the one founded 
in 1792, the present Settlement, which occupies the site of the 1789 one and which 
dates from March 1858, has been named Port Blair in honour of the original 
founder. The name Port Cornwallis is still used to designate the site of the Settle¬ 
ment in North Andaman that existed from 1792 to 1796. 
48 
