350 Journal of the Asiatic Society of Bengal. [June, 1908. 
4. The Fatikuli sandstone is overlaid by a layer of ferru- 
ginous concretions, perhaps of lateritic 
ier con- origin, which though much decomposed 
be 
cretions 
h 
ibe sucutane and in a Pia comeing good state of preservation 
the town of Agartala. A good exposure of this is to be 
concretionary layers. The concretions are pisolitic, though often 
ravelly, the pebbles akictcdaaive measuring about three inches 
across. They often assume a coating of dark brown colour due 
whi 
with gravelly forms of laterite. These concretions consist 
mainly of limonite. 
5. There rises, about Gust a. to the — of the town 
0. range, wi <3 
Fossil Wood group. average heig *nt of 90 feet abow e sea-leve 
and 40 feet sages the level of the shin. This low hill exten 
for a distance of about ten miles, north and south, and is 
a8 the Lalmai Fange. at} is made up of slightly micaceous, yell. - 
concretions which, when decom- 
are colour the fp. of the hill brick-red. The sandstone is not 
ted and appears to lie horizontally. There are also 
horizontal sori el of clay, only a few inches thick, and 
occasional occurrences of argillaceous nodules. The clay- varies 
in colour from white to dark black. Some pebbles of quartz 
were also shearved. but they were extremel re. At the 

ceous material and consists of a conglomerate of d osed rocks 
which are chiefly sandstone with occasional eres of soft shal 
mudstone. Ferruginous concretions and pebbles are Mid rare, 
but the most striking feature here is the abundant oc 
nts s 
dimensions with a diameter of several inches. ey are com- 
pletely silicified and are well exposed in a section near Uhandipar, 
and all lie horizontally; I failed to discover any in an erect 
post hey apparently lie parallel to one another and might 
have been drifted by as nt of this fossil wood 
were hrnacad examined by Burkill, who is van = fee it, 
6. In the midst of the fertile alluvial we there is 
a peculiar uncultivable area a 
Eco tices mile long and jth of a mile broad, 
locally known as the pyaro-land, which is covered over with turf 

