1890.] 



D. Prain — A List of Diamond Island Plants. 



291 



Table III. BelationsMp of Transgangetic Distribution to Ilahit 

 and Habitat. 



Habit. 



Distributional Features. 



Habitat. 



1 



w 



H 



m 



M 





II 

 1^ 



1 





3 



d 



M 



m 

 O 



6 



9 



6 



3 



o 



70 

 3 



15 

 2 



16 

 1 

 4 

 1 



1 

 23 



16 

 2 

 2 



1 



2 



25 

 5 



13 



4 



1 



1 



In all 3 districts and widely distributed in 

 the Arracan-Assam district ... 



In all 3 districts but represented in Arra- 

 can by the Diamond I. gathering only ... 



Absent from Andaman-Nicobars, but 

 widely distributed in Arracan... 



Absent from Andaman-Nicobars and only 

 represented in Arracan by the Diamond 

 I, gathering... 



Absent from Pegu ; and at the same time 

 only known from Arracan by the Dia- 

 mond I. gathering 



Absent from Pegu and Andamans ; widely 

 distributed in Assam- Arracan... 



Only known from Diamond Island 



8 

 1 



1 



10 



8 



1 



9 



22 

 2 

 9 



2 



1 



1 



1 



38 



7 



... 



3 



17 



1 



1 



4 



3 



70 



3 



15 



3 



1 



... 



2 







3 



1 



1 













1 





Ts 



30 



19 



10 



20 



1 



4 



3 





95 



Totals 



95 



The first line of this table represents that element in the flora o£ 

 the island wherein the influence of the three adjacent districts may be 

 assumed to act indifferently ; the second line that wherein the influence 

 of the Arracan district is to be eliminated and only Pegu-Malayan and 

 Andaman-Nicobar influences (presumably equally) prevail ; the third 

 line that wherein Pegu-Malayan and Arracan- Assam influences prevail, 

 while Andaman-Nicobar influences do not act ; the fourth contains the 

 element representative of Pegu-Malayan influences alone ; the fifth that 

 representative of purely Andaman-Nicobars influences ; the sixth that 

 indicating purely Assam- Arracan influences ; the last, like the first, in- 

 dicates an element wherein the influences of the three areas act in- 

 differently but in the opposite way. As however this element (the 

 endemic) is here only represented by one species, it is not convenient 

 or useful to employ it in computation, and since Diamond Island is 

 geographically inseparable from Arracan this species is treated as 

 indicative of Arracan influence. 



Reasoning from particulars the Andaman influence is stronger 

 than either the Pegu or the Arracan influence is, so far as positive evi- 

 dence goes, for there arc here fhree exclusively Andamanese species as 



