INTESTINAL TRACT OF MAMMALS. 



201 



Order Xenarthka. 



Family Myrmecophagidfe. Tamandua tetradactyla. 



I have been able to examine another example of the Tamandua 

 Ant-eater. The duodenal region and Meckel's tract were almost 

 exactly as represented in the figure I formerly gave (Mitchell, 

 1905, fig. 11), except that the minor loops of the tract were 

 rather more numerous and more thickly set. The distal end of 

 the tract entered the expanded proximal end of the hind-gut 

 between a well-marked pair of shallow pouches corresponding 

 with, but not so elongated as, the pair of caeca in the Armadillo 

 (text-fig. 11, C). The hind-gut was relatively rather longer, and 

 not quite so large in calibre. It displayed a colic loop attached 

 to the duodenal region by a colico-duodenal ligament, but distad 

 of the pendant loop and corresponding Avith an ansa coli sinistra. 



Family Dasypodidse. Basi/pits villosus {text-6.g. 11). 



I have been able to examine the alimentarj^ tiact in a very 

 young example, little more than a foetus, of the Hairy Armadillo. 

 The duodemal region was represented by two proximal loops not 

 well separated from Meckel's tract. 



Text-figure 11. 



Intestinal tract of verj^ j-oung Dasypus villosus. 



S. Cut end of the gut next the stomach ; R. Id., next the rectum, 

 ceeca. C.L. 2. Colic loop {ansa coli sinistra). 



C. Paired 



Meckel's tract was very long, and was suspended on an 

 •elongated fold of mesentei-y. The proximal limb of the loop thus 



