1923. | Adhesive Pads of Gecko, etc. 145 
fingers with their own excreta or other substances and deposit 
this extraneous matter on the glass walls. 
In an 
A somewhat similar phenomenon is illustrated by the 
heel-pads found in the nestling of certain birds which are 
reared in holes on the bare ground or in hollow trunks. ‘ In 
moving about the nest-hole, particularly when wishing to 
of the hollow cavity in a tree in which it is hatched, the pads 
forming, as it were, a second set of claws. The theory is sup- 
ported by the fact that young parrots which have no well- 
developed tubercular pads are stated to use their beaks when 
moving about in their nest.”’ 2 
! Giinther, Ibis, p. 411 (1890). ‘ 
Cheam. owen. Malegun Branch Roy. As. Soc., I, p. 239 (1923). 

