IXTESTIXAL TRACT OF MAMMALS. 233 



hinfl-gnt, and simple suspension from a continuous mesentery. 

 In tlie Walrus (text-fig. 26) there is no clear separation of the 

 duodenal region fioni Meckel's tract. Tlie latter has an almost 



Text-figure 27. 



Intestinal tract o{ Jlacrorhimis leoniiius. 



From a photograph by Mr. D. Seth-Smith. A pocket-knife has been inserted into 

 the cavit}- of the duodenum where it was separated from the stomach ; the cut 

 distal end of the rectum has been bent upi towards the duodenum to bring it 

 into focus. 



even calihre throughout its length, and is very long (its length, 

 although relatively less than that of the Elephant-Seal, has been 

 lutlier under-estimated in the diagram). It is thrown into a 



