Sauromalus (1 species) 

 Callisaurus (2 species) 

 Uma (3 species) 

 Holhroo\ia (6 species) 

 Sceloporus (17 species) 

 Uta (1 species) 

 Urosaurus (2 species) 

 Streptosaurus (1 species) 

 Phr^'nosoma (9 species) 

 Family ANGUIDAE Plated Lizards 



Scales large and smooth, squarish; with a fold of skin length- 

 wise along each side; tongue long and deeply forked, protrac' 

 tile; legs small or absent 

 Two genera — Ophisaurus (1 species) 

 Gerrhonotus (5 species) 

 Family ANNIELLIDAE 



Legless; eye a narrow slit 

 One genus — Anniella (1 species) 

 Family HELODERMATIDAE 



Scales bead-like; tail short and thick; teeth hooked; lower jaw 

 with grooved poison fangs 

 One genus — Heloderma (1 species) 

 Family XANTUSIIDAE 



Pupil vertical; back and sides with granular scales; abdomen 

 with plates 



One genus — Xantusia (4 species) 

 Family TEIIDAE 



Tongue long, narrow and deeply forked, protractile; scales 

 granular above 



One genus — Cnemjdophorus (7 species) 

 Family SCINCIDAE Skinks 



Scales large and smooth, rounded; no folds of skin on sides; 

 legs small 



Three genera — Leiolopisma (1 species) 

 Eumeces (16 species) 

 7S[eoseps (1 species) 

 Family AMPHISBAENIDAE 



No visible eyes or ears; limbs absent or vestigial; scales not 

 overlapping, arranged in rings around the body 

 One genus — Rhineura ( 1 species) 

 (Genus Bipes is found in Lower California) 



362 



