THE ADDER. 



107 



rest of the body contents. The liver is arranged in a 

 semicircle to reduce the compass of the illustration ; in 



Fig. 28.— Dissectiox of the Heart, lirxG, and Liveh. 



situ it is quite straight. The small blood-vessels are 

 seen stretched over the distended simple lung, just as 

 they would be when the adder was taking a deep breath. 



