is, 2 Smith: Ancient Cave Dwellers of Batwaan 235 
weathers to a blue-gray. The caves in the limestone are the 
result of solution by water. 
The caves . — The caves explored by Mr. Schwab and the writer 
are four in number, but there are several more in the hill. 
These four he has designated as follows: The great living 
cave, the burial cave, the ceremonial cave which is in reality a 
part of the living cave, and the great guano cave. In fig. 2 the 
general situation with reference to these caves is shown. 
Fig. 1. Masbate Island ; outline, showing cave site at X. 
The great living cave is located at the southeast end of the 
hill and has a large opening which lets in plenty of light. The 
cave is somewhat semicircular in shape but is very irregular. 
It is perhaps 15 meters high and 20*meters long, and toward 
the back end of the cave the floor slopes upward to a chimney- 
like opening above. Special features of this and other caves 
of the hill are the large cylindrical holes in the roof. These are 
in some cases about a meter in diameter, but most of them are 
about 8 centimeters in diameter, and they do not go through 
