THE ADDE1? 



101 



the average diameter when distended 1 inch, and the 

 average circumference 31 inches ; so that the total 



Fig. 25. — Gullet of Adder, distended to .show Capacity. 



capacity is considerable. It is only divided from the 

 stomach by a slight constriction. (These points are 

 clearly seen in the illustrations of the distended gullet 



