REPTILES. 



75 



the heat of the sun or to the warmth developed by 

 decaying vegetable matter. Several reptiles (adder, 

 for example) keep their eggs in their bodies tiU the 

 young escape. Reptiles have either no limbs (snakes, 



Fig. 46. — Common Lizard (Lacerta agilis) ; 2, head of the same from below ; 3, tongue. 



a few lizards), or, at any rate, the limbs are not well 

 developed, and are so placed that the body does not 

 rest upon them, but is slung between them. 



The Reptilia are divided into the Orders of Croeodilia 

 (Crocodiles), Chelonia (Turtles and Tortoises), Lacer- 

 tilia (Lizards), OpMdia (Snakes). 



Our native reptiles have no agricultural import- 

 ance. I will, however, briefly mention the Adder 



