444 



DE. P. CHALMERS MITCHELL ON THE 



supra-duodenal loop in Birds. There is no special resemblance between the gut-pattern 

 of the Monotremes and those of other mammalian groups. There is a general 



Fie;. 2. 



Intestinal Tract of Echidna hystrix. 



S. Cut end of duodenum next stomach. 

 R. Cut end of rectum near cloaca. 

 C. Ccecum. 

 C.L. Colic loop. 



resemblance, due rather to absence of specialisation than to the presence of definite 

 characters with the gut-patterns of the Insectivora. 



