252 



ZOOLCGY. 



they may be replaced by whalebone, as in certain of the 

 cetacea (Figs. 15 and 16), or by a horny bill, as in the orni- 

 thorhynchus paradoxus ; hence the name. 



Gullet. 



(Esophageal 

 Groove. 



Maniplus. 



"Duodenum. 



Pylorus. The Kennet. 2nd Stomach. Paunch. 

 Fig. 216. Stomach of the Sheep. 



404. The stomach is usually simple, as in man (Fig. 24) 

 and'the ape (Fig. 5) ; but in others, as in ruminants, the organ 

 is subdivided into a number of compartments, from the first 



Gullet. - 

 (Esophageal Groove. 



Maniplus, or Third 

 Stomach. 



Rennet, or Fourth 

 Stomach. 



Duodenum. 



Pylorus. Second Stomach. Paunch. 



Fig. 217. Interior of Stomach of the Sheep. 



of which the food, after remaining a certain time there, re- 

 turns to the mouth by the gullet, to be remasticated (rumi- 



