390 Mr. Gray on the Slender-tongued Saurians, 



Ab. taniatus, G. taeniatus, Wiegm. Herp. Mex. t. 6. f. 1. Bluish- 

 white, black banded. 



Mexico. 



Gerrhonotus, Wiegm. Cordylus, De Blainv. Head pyramidical 

 with an odd anterior central plate between the 4 or 6 polygonal 

 frontal ones ; toes 5 — 5 ; tail round, tapering, about as long as the 

 body ; back and tail with keeled unarmed scales forming continued 

 ridges on the back. 



Gerrhonotus cceruleus, Wiegm. Herp. Mex. 31. 



Brazil. 



Gerrhonotus tessellatus, Wiegm. Herp. Mex. 31. 1. 10. f. 3. (head). 

 Scincus ventralis, Green. 



Jun. Gerrho. liocephalus, Wiegm. 



Mexico. 



Gerrhonotus Burnetti, Gray, Beechey's Voyage, t. ined. Pale olive, 

 sides with cross bands of white tipped dark brown scales, beneath 

 white brown; back with 16, belly with 12 rows of scales; tail thick, 

 as long as the body and head. 



South America. Brit. Mus. 



Barisia. Head pyramidical, without any odd anterior central 

 plate between the two or three pairs of frontal ones. Toes 5 — 5 ; 

 tail round, about as long as the body. Back and tail with round 

 keeled unarmed scales. 



* Ventral plates 14-rowed. 



Barisia rudicollis, Gray. Gerrhonotus rudicollis, Wiegm. Herp. 

 Mex.t. 10. f. Land 4. 



Mexico. 



** Ventral plates \2-r owed. 



Barisia imbricata, Gray. Gerrhonotus imbr., Wiegm. Herp. Mex. 

 t. 10. fig. 2. and 5. 



Mexico. 



Barisia lichenigerus. Gerrhonotus lichenigems, Wagler, Icon.Amph. 

 t. 34. f. 2. Gerrho. adspersus, Wiegm. Herp. Mex. 1. 10. f. 6. (Head). 



Mexico. 



Elgaria. Head pyramidical with a large central anterior frontal 

 plate placed between two pairs of very narrow long band-like ante- 

 rior, and a pair of large 6 -sided posterior frontals. Occipital plates 

 scale-like. Back and tail with slightly keeled armless scales. Toes 

 5 — 5, limbs weak ; tail much longer than the body, slender. 



Elgaria Kingii. Gerrhonotus Kingii, Bell. MSS. Pale brown, 

 head brown spotted with two diverging streaks on each side of the 

 occiput ; back and tail with brown cross bands, some of the scales 



