50 SIR DIETRICH BRANDIS— AN ENUMERATION 
more enter the lateral leaf-traces destined for the next higher 
internode. 
The material for examining internode and petiole of Dryoba- 
lanops oblongifolia I owe to the liberality of the British Museum, 
while in regard to D. lanceolata and aromatica 1 am indebted 
to the Royal Botanical Museum at Berlin. For D. Beccari? Y 
have not had material for examination. 
The essential anatomical characters of the genus, as far as 
known, are:—One main duct in the middle of the pith, which sends 
out braneh ducts into the lateral and apical leaf-traces as well 
as into the axillary bud; two lateral leaf-traces m the bark, 
separating from the central cylinder at the base or in the middle 
of the internode. The pith consists of one class of cells with 
thickened walls in D. lanceolata; of two classes, thick-walled and 
thin-walled cells, in the two other species. In the outer bark are, 
in all three species, two classes of sclerenchymatic cells, circular 
with the walls thickened all round, and horseshoe-shaped cells, 
with tbe inner wall only thickened. 
A small genus, only four species known at present, one from 
the Malay Peninsula, Sumatra, and Borneo, and perbaps some 
of the South Philippine Islands, the other three from Borneo. 
1. DRYOBALANOPS AROMATICA, Gaertn. f. Fruct. iii. (1805) 49, 
t. 186; Burck in Ann. Jard. Buitenz.vi. (1887) 248—D. Camphora, 
Colebr. Asiat. Research. xii. 5835. 
Sumatra (where, according to Korthals, it grows gregariously) ; 
Lingga; Borneo. According to Vidal, *Sinopsis de plantas 
leñosas, p. 48, also probably on Balabac and other Philippine 
islands. Mr. Ridley tells me that the tree grows in some 
quantity on the river Indau in the northern part of Johore, Malay 
Peninsula, and that the natives obtain oil and camphor from it. 
Leaves ovate, long acuminate; cup of fruiting-calyx enclosing 
half or more than half of the fruit ; segments lanceolate, obtuse, 
7-9-nerved. Fruit ovoid. 
2. D. Beccari, Dyer in [.London] Journ. Bot. xii. (1874) 100, 
t. 142. figg. 6, 7 ; Burck in Ann. Jard. Buitenz. vi. (1887) 243. 
Borneo (Beccari, nn. 2553, 2944) (2994, Burek). 
Leaves elliptic, shortly acuminate ; cup of fruiting-calyx small, 
enclosing only base of fruit ; segments linear-spathulate, pro- 
minent oblique and ramified veins joining the 9 longitudinal 
nerves. Fruit ovoid, with numerous raised lines. 
