MAMMALIA. 



341 



have either one or two humps upon the back, composed of 

 fatty matter ; in the paunch are several cells (Fig. 364, a) 



FIG. 364. a, Water-cells in the paunch of ths camel ; b, foot, showing the 



pad. 



that contain a supply of water to last them in the dry coun- 

 try in which they live. Their feet (Fig. 364, b) are equally 

 adapted to the dry sand, the two toes uniting nearly to 



FIG. 365. The true camel (Came/us dromedariits}. 



