19, 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. 
To 
Fic. 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 
