REPTILES AND AMPHIBIA 



167 



known that the males of this species are extremely pugnacious 

 and fight whenever they meet. As weapons they use their 



Ft 3. 17. Chavueleon Willsii, a Channeleon found in Madagascar. A, male ; a, head 

 from above ; B, female ; b, head from above. 



teeth, a fact which corresponds to the absence of horns. 

 The movement of the scales of the back under excitement 



