230 REPTILES, 



Fara. XX. The Agamas, (Agamid^). 



Teeth implanted on the edge of the jaws. Tongue short, de- 

 pressed, apex entire or slightly nicked. Eyelids connivent, valvu- 

 lar. Feet for walking. Toes all free, unequal, the thumb of the 

 hind feet on the same plane as the other toes, the little toes lower 

 down on the ankle than the thumb. 



The thumb is anterior and internal, and the great toe of the 

 hind feet occupies the same position, the thigh and foot being bent 

 forwards. This is proved by analogy; this toe being the one that 

 is clawless in the Gecko, which have the clawless thumb, and in 

 Anolis, where the thumb and great toes are simple, and not dilat- 

 ed beneath, like the other toes. 



Synopsis of the Genera. 



I. Body compressed. Living on trees. 



A. Femoral and preanal pores none. Scales imbricate. Asiatic. 



a. Ribs elongated^ exserted, supporting loing-like lateral expansions. 



Throat with 3 pouches. 



1. Draco. Ears naked. Nostril below the face-ridge. 



2. Dracocella. Ears naked. Nostril above the face-ridge. 



3. Dracunculus. Ears covered with scales. 



b. Ribs simple. Back crested. 



* Toes 5-4. Ears exposed. 



4. SiTANA. Males with an elongated pouch. Females without 

 any pouch. 



** Toes b-b. Tail with elongated keeled scales beneath. Scales of 

 back small, often with scattered larger ones. 



f Ears hidden under the skin. 



5. Lyriocephalus. Head lyrate. Muzzle with a round tuber- 



cle in front. Scales unequal. 



6. Ceratophora. Head square. Muzzle with a prolonged 



hom-like process. Scales unequal. 



7. Otocryptis. Head squarish. Muzzle nearly flat, simple. 



Eyebrows bluntly angular behind. 



