342 



COMPARATIVE ANATOMY 



Oes 



H 



FIG. 251. DIAGRAMS OF THE STOMACH IN VARIOUS MAMMALS SHOWING THE 

 DIFFERENT REGIONS. (After Oppel. ) 



A, ORNITHORHYNCHUS ; B, KANGAROO (Dorcopsis luctosa) ; C, TOOTHED WHALE 

 (Ziphius); D, PORPOISE; E, HORSE, F, PIG; G, HARE; H, HAMSTER 

 ( Cricetusjrtimentarius). 



The oesophageal region (lined by stratified epithelium) is indicated by transverse 

 lines ; the region of the cardiac glands by oblique lines ; that of the fundus- 

 glands by dots ; and that of the pyloric glands by crosses. 



Z>, duodenum ; /(in H), fold bounding the oesophageal region ; / IV (in D), the 

 four chambers of the stomach ; / (in B), lymphoid tissue ; Oes, oesophagus ; 

 P, pylorus ; x...x (in B), boundary line between the cesophageal and cardiac 

 regions. 



