VARIATION AND MUTATION 



139 



Lacerta ocellata 



Lacertaviridls 



Neck 

 Bodif 



Hind Legs 

 [Tail 



f • 



Lacerta agilis 



.Necii 

 Bodif 



Hind Legs 

 Tail 



Lacerta muralis 



Neck 



Body 

 Hind Legs 



Lacerta velox 



Neck 



.Body 

 —.Jlind Legs 

 .....Tail 



Lacerta deserti 



Neck 



5odg 



HirnJ Legs 



^amtmmmTbi/l 



1 



Fig. 82. — Diagram showing variations in dimensions of lizards, (..\fttr Wallace.) 



influences, naturally tend to i)resent analo<:;ou.s variations, or these 

 same species may occasionally revert to some of the characters of their 

 ancient progenitors. Althou<2;h new and important modifications may 

 not arise from reversion and analo.s^ous variation, such modifications 

 will add to the beautiful and harmonious diversity of nature. 



