261 



COMPARATIVE ANATOMY 



Oes 



FIG. 212. DIAGRAMS OF THE STOMACH IN VARIOUS MAMMALS SHOWING THE 

 DIFFERENT REGIONS. (After Oppel.) 



A, ORNITHORHYNCHUS ANATINUS ; B, KANGAROO (Doreopsis luctuosa) ; C, TOOTH KD 

 WHALE (Ziphius] ; D, PORPOISE ; E, HORSE ; F, PIG ; G, HARE ; H, HAM- 

 STER ( Cricetus frumentarivx). 



(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. ) 



Ocs, oesophagus ; P, pylorus ; D, duodenum ; / IV (in D), the four chambers of 

 the stomach ; I (in B), lymphoid tissue ; x...x (in B), boundary line between 

 the oesophageal and cardiac regions ; /(in H), fold bounding the <esophagenl 

 region. 



