TONGUES 97 



Id all the true lizards of the Old World the 

 tongue is forked and smooth, but not sheathed. In 

 the family of the skinks, which includes our blue- 

 tailed and ground-lizards, the tongue is only slightly 

 notched, and is rough or scaly ; but in the family of 

 the Iguanidm^ which includes our so-called " chame- 

 leon " (Fig. 52), the common little " swift lizard," 

 and all the host of horned toads {Phrynosoma\ the 

 tongue is smooth, short, and barely notched, and it 

 can be j)ut out a slight distance only. 



The chameleon proper has a tongue which it can 

 expand at the end at will, and thrust far out by 

 means of a long stretchy stem — thus easily capturing 

 insects. 



