444 



ZOOLOGY 



chewed. This peculiar structure is correlated with the habit 

 of rapid feeding and retirement to less dangerous or exposed 

 locations, where the- food is forced back to the mouth in appro- 



B 



FIG. 234. Diagram of stomach of dog (A) and rat (B). After Wiedersheim. 



FIG. 235. Diagram of stomach of Ruminant. After Wiedersheim. 



Questions on the figure. What is the significance of the term ruminant? Of 

 what conceivable advantage is this form of stomach? What animals belong to the 

 class? 



priate quantities and chewed at leisure. When swallowed the 

 second time the food passes on to the glandular divisions of the 

 stomach. 



The liver and the pancreas pour their secretions into the 



