494 



DE. P. CHALMEES MITCHELL ON THE 



is confined to the enormously elongated, thick-walled Meckelian portion ; the hind-gut 

 and the caecum show a close resemblance with what is found amongst Carnivora 

 generally. The resemblance between the gut of the Cetacea and of the Seals and 

 Sea-Lions is therefore purely adaptive, and is in relation to the fish-eating habit. 



Fig. 32. 



Intestinal Tract of Otaria californiana. 

 S.- Cut end of duodenum near stomach. 

 E. Cut end of rectum near anus. 

 C. Caecum. 

 X. Divided ends of posterior mesenteric vein. 



