OF THE CLASS MAMMALIA. 



239 



with the gullet, which indeed seems to open equally into the 

 first and second. After being ruminated, the food descends 

 from the gullet into the third stomach by means of a semi- 



Gullet 



(Esophagean 

 Groove. 



Maniplus. 



Duodenum. 



Pylorus. TheKennet. 2nd Stomach. Paunch. 

 Fig. 187. Stomach of the Sheep. 



canal, which no doubt becomes complete at the time, thus 

 directing the food in one course only, diverting it from the 

 paunch and second stomach ; from the maniplus, it passes 

 into the rennet or fourth stomach, in which cavity digestion 

 is finally completed. 



Gullet. 



CEsophageal Groove. 



Maniplus, or Third 

 Stomach 



Rennet, or Fourth 

 Stomach. 



Duodenum. 



Pylorus. Second Stomach. Paunch. 





 Fig. 188. Interior of Stomach of the Sheep. 



The act by which the food passes when first swallowed 

 into the paunch and thence to the second stomach, but which 



