298 
FASCICULI MALATENSES 
Radial Formulae of Periophthalmus phya 
Localities — Estuaries of Jambu and Patani Rivers. 
‘ A most important feature in which the habits of the present form differ 
from those of its congeners is that it constructs a more or less permanent 
burrow, in which it takes refuge .when alarmed and remains in bad weather. 
Whether this burrow is also used as a nest we cannot be sure, but it appears to 
be frequented by individuals of both sexes, and the natives say that the 
female deposits her eggs in smaller holes made for the purpose. The main 
entrance to the large burrows (PI. XIV) is always more or less funnel-shaped and 
