GENERAL CHARACTERS OF REPTILES. 539 



the ordinary respiratory movements impossible ; and then it is 



Arches of Aorta 



Left auricle-. 



Super, vena cava 



Ventral Aorta" 



Pulmonary artery 

 Inferior vena cav 



.' 



..Carotid artery 



Arches of aortn 

 ht auricle 



,.- Pulmonary vein 



- '_, f Brachial artery 



..- "'Pulmonary artery 



Vena portz? 



In test! ties 



FIG. 314.-CIRCULAT1NG APPARATUS OF LIZARD. 



by an act of deglutition, that the air is forced into the lungs. 

 It is likewise to be noticed, that Serpents present, in the arrange- 



