EPIDERMAL APPENDAGES. 



323 



cluster of leaf-like scales in three distinct pairs decorating 

 its nose. These in the individual at the Zoological Gardens 

 were particularly ear-like, and there was a remarkable 

 peculiarity about them which was not found in either of the 

 other horned specimens when dead. It was, that when one 

 horn was moved divergently with the finger, its fellow moved 

 without being touched to correspond, and when let go both 

 sprang back to their original position. I at first was merely 

 feeling and examining them when this singularly sympathetic 

 movement arrested my attention. Then I tried it with each 

 of the six scales or ' horns ' several times, and always with 

 the same result. Whichever one of them was held back, the 

 opposite one diverged at a corresponding angle. 



1. Natural position. 



2. Three held back to 

 their utmost 



^^ 



3. Three held back 

 partly. 



Their natural position is nearly erect, and when one horn 

 — say the longest to the right in Fig. I — was pressed or 

 pulled outwards, we might suppose that in a dead specimen 

 it would drag its fellow that way also, should any movement 

 at all take place ; instead of which, it flew off in the opposite 

 direction, like two negative or two positive poles repelling 

 each other. If I pressed the three to the right as much as 

 in the centre figure, the other three receded similarly to the 

 left. Each pair acted in concert in this remarkable manner, 

 or each two pairs, or all three pairs. 



