THE LIZARD. 



155 



vent is a large pre-anal plate ; the scales on the tail are 

 elongated, keeled, and arranged in definite transverse series, 

 giving the tail a ringed appearance ; on the limbs the pre- 

 axial scales are for the most part large, the post-axial small ; 



FIG. 38. The head from above and from the side of A. Lacerta 

 viridis ; B. Lacerta agilis ; C. Zootoca vivipara (slightly enlarged). 

 After Schreiber. 



on the neck they are small, except at its junction with the 

 trunk, where there is a transverse fold bounded anteriorly by 

 larger scales ; on the head, the scales are for the most part 

 large, and have a very definite arrangement characteristic 



