S98 A COMMENTARY ON THE SECOND BOOK 
Arbor Koring, p. 74. 
This tree, by an operation exactly similar to that used 
for the same purpose with Dipterocarpus^ yields an oil 
used for burning, and is therefore probably of the same 
genus. In Chatigang there are two species of Diptero- 
car'pus which produce oil ; one of which has leaves, except 
in size, not very unlike those of the Matigium album, with 
which Rumphius compares those of the Koring^ and it 
may therefore be the same. In 1798, I sent to Sir Joseph 
Banks four species of this genus, which I then called 
Hopea; and it was from two of these, probably, that 
Gsertner took his figures and descriptions of the Diptero- 
carpus costatus and D. turhinatus (De Sem. iii. 50, 51, 
t. 187, 188, f. 1). It must be remarked, that the generic 
name of these plants among the Bengalese is Garjan, and 
they divide this into two species, Telia and Dulia, from 
the uses to which they are applied ; for two of them give 
oil {tel), and two are used for constructing litters (dull). 
It is remarkable, that of each kind there is one with a fruit 
like the D. costatus, while the fruit of the other resembles 
that of the D, turhinatus ; also, that, of each kind, one 
grows near the sea, and the other on the mountains. Fur- 
ther, Dr Roxburgh mentions four species (Hort. Beng- 42), 
probably the same with those which I found in Chatigang, 
although one of them came from Pegu, where, as well as 
in the Andaman Islands, I have seen an oil-bearing kind, 
although I had not there an opportunity of examining the 
fructification. I shall here describe the kinds, of which I 
sent specimens to Sir Joseph Banks, quoting the catalogue 
sent along with them as Buchanan MSS. ; for I must now, 
in compliance with custom, adopt the barbarous generic 
name given by Gaertner ; nor are his specific names good, 
two plants being equally entitled to the appellations costa^ 
