CLA SSIFICA TION OF VER TEBRA TA 2 5 



with sutural symphysis. Pectoral girdle at least vestigial, 

 except in the degraded families, 13-17. 



i . Sub-order GECKONES, Spix. Lepospondylous. With 

 columella cranii. Sternum, girdles and limbs complete. Eibs 

 prolonged ventrally across into abdominal ribs. Cosmopolitan, 

 warmer zones. About 270 species. 



Geekonidae. Amphicoelous ; parietal bones distinct. 

 Gecko, Teratoscincus, etc. 



Uroplatidae. Amphicoelous ; parietal single. 

 Uroplates in Madagascar. 



Uublcpharidae. Probably a heterogeneous group. Pro- 

 coelous ; parietals fused into one. 



West Africa, Central America, Indo-Persia. 

 Eublepharis, etc. 



2. Sub-order LACERTAE, Spix. Stereospondylous, pro- 

 coelous. With columella cranii, except in most of the burrow- 

 ing, degraded families. Cosmopolitan. About 1300 recent 

 species. 



1. Agamidae. Acrodont ; without supratemporal arch ; 

 without osteoderms. Tongue thick and short. With postorbital 

 and postfronto-squamosal arches. Limbs well developed. Asia 

 and SE. Europe, Africa excluding Madagascar, Australian region. 



Galotes, Draco, Agama, Chlamydosaurus, Uromastix, 

 Moloch, etc. 



2. Iguanidae. Pleurodont, without supratemporal arch ; 

 without osteoderms on body. Tongue thick. 



With postorbital and postfrontal arches. Limbs well 

 developed. 



America, Madagascar, Fiji, and Friendly Islands. 

 Anolis, Basiliscus, Polychrus, I guana , Phrynosoma. 

 Amblyrhynchus. Galapagos ; algivorous. 

 Chalarodon and Hoplurus in Madagascar. 

 Brachylophus. Fiji and Friendly Islands. 

 .">. Xenosauridae. Differs from Iguanidae by the teeth 

 not being hollow at base, and by the anterior part of the 

 tongue being retractile. ■ ■ 



Xenosaurus grandis. Mexico. 

 4. Zonuridae. Like the Iguanidae, but the supra- 

 temporal fossa is roofed over by dermal bones. Distinguished 



4 



