342 



COMPARATIVE ANATOMY 



Oes, 



H 



Fir;. 251. DIAGRAMS OF THE STOMACH IN VARIOUS MAMMALS SHOWING THE 

 DIFFERENT REGIONS. (After Oppel.) 



A, ORNITHORHYNCHUS ; B, KANGAROO (Dorcojms litctom) ; C, TOOTHED WHALE 

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

 ( Cricet us frumentarius). 



The resophageal 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. 



/>. duodenum ; /(in H), fold bounding the cesophageal region ; 7 IV (in D), the 

 four chambers of the stomach ; I (in B), lymphoid tissue ; Oes, cesophagus ; 

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

 regions. 



