5 1 8 LACERTAE chap. 



0. versicolor ranges from Afghanistan through the whole of 

 India to Southern China, and attains a length of 14 inches, 11 

 of which are taken up by the tail. It possesses no gular sac, but 

 has a well-developed crest. The whole body and tail are covered 



Fis. 124. — Lyriocephalus scutatus. x f . 



with strongly keeled scales. When the lizard is irritated, or 

 swallowing its food, the head and neck become brilliant red, whilst 

 the usually brownish tint of the body is converted into pale yellow. 

 Mr. Annandale has favoured me with the following observations 

 on 0. etnma : — " In the Malay Peninsula the Europeans misname 

 this lizard Chameleon. The colour-changes appear to be brought 

 about by emotions, although the lizard is often darker towards 



