INTESTINAL TKACT OF MAMMALS 



481 



nearly equal in length, which are folded over on Meckel's tract in the undisturbed 

 condition. The second portion of the hind-gut is a relatively long and nearly straight 

 rectum. 



The anterior mesenteric vein sweeps round the mesentery of Meckel's tract, and is 



Fig. 26. 



Intestinal Tract of Xerus cajaensis. 



S. Cut end of duodenum near stomacli 

 It. Cut end of rectum near amis. 

 C. Ciccuni. 



CLi. | 

 CLz. J 



Colic loops. 



X. Cut ends of posterior mesenteric rein. 



joined by a large; colic vein. The posterior mesenteric vein, which drains the rectum, 

 joins the anterior mesenteric near the edge of the mesentery. 



