MANUAL OF NATURAL HISTORY. 65 



26. Family. — Crested-Lizards (Draconidse). Body 



compressed; tongue short, depressed, apex 

 entire, or slightly nicked; eyelids connivent; 

 feet for walking ; thumb anterior and inter- 

 nal; great toe of hind foot occupies same 

 position; teeth on edge of jaw-bones; live in 

 trees. 



27. Family. — Spinous-Lizards (Agamidae). Body 



depressed; tongue short, depressed; eyelids 

 valvular ; scales of back imbricate ; throat 

 with a cross fold ; toes free, unequal ; terres- 

 trial. 



5. TRIBE. — Dekdrosaurians (Dendrosauria). 



Scales of belly, sides, and back, granular ; tongue 

 elongate, sub-cylindrical, worm-like, very exsertile; 

 eyes globular, very mobile, with a small, central, 

 round opening; toes equal, united into two opposing 

 groups ; ears hidden. 



25. Family. — Chameleons (Chamseleonidse). Body 

 compressed; scales generally granular; tail 

 prehensile; teeth implanted on edge of jaw- 

 bones; males distinguished by thickness of 

 base of tail ; slow-moving animals. 

 The arrangement of the toes of the Chamelions 

 into two opposing groups is beautifully adapted to 

 their habits, enabling them to take a firm hold of 

 what they crawl along, and almost quite to encircle 

 small branches. The division of their toes is rather 

 singular, on the fore feet two toes being external 

 and three internal, while in the hind feet the num- 



