XXii Annual Report. [February, 1915. 
and troublesome genus. The following new species are des- 
cribed in detail—D. cambodiana from Cambodia; D. membra- 
Szechuan: D rae a aa Southern China nitens from 
Yunnan; PD. Martini from Southern China; D. velutipes from 
the Shan Hills; D errii from Siam; D chnida from 
from Luzon: D. Seemanni from the Filchi Islands ; rata 
from the Philippines; - Lepcharum from Sikkim brevi- 
petiolata from Indo-China; D. Havilandi: from Bolaees ahd D. 
oc asta probably beth the Philippines 
s ‘*Studies on the Leaf Structure of Zoysia pungens, 
Willd. “MV. S. Ramaswami shows how the leaf structure of 
this species of sand grass is modified for the purpose of an 
economic utilization of a limited water-supply, the prevention 
of excessive transpiration and the protection against the effect 
of 79 winds and strong salination. 
. S. Ramaswami describes a new species of Diospyros, 
ea by him Diospyros Barberi, which appears to be restrict- 
ed to the Tinnevelly hills. 
The same author gives an account of the extreme varia- 
bility of the leaf of Heptapleurum venulosum, Seem., the leaf 
varying from simple digitate and bifoliotate to twice digitate 
with as many as twenty-four leaflets. 
GEOLOGY, 
Hayden has published a Note on the applica : 
BA cea) 3 ead 
tion of the Principle of Isostatic Compensation to the condi- 
tions prevailing beneath the Indo-Gangetic Alluvium. 
e paper, already referred to, on ‘‘ The Limestone Caves 
of Burma and the Malay Peninsula’’, contains also a short 
account of the physiography and geology of these caves, many 
of which are mere recesses, whilst in other cases they consist 
siderable diameter. The caves are situated in a series of lime 
stones, probably everywhere of anthracolithic age, extending 
from Western China and the Philippines to the Malay Penin- 
sula and Borneo. Recent and subrecent fossils buried in the 
