222 



DR. P. CHALMERS MITCHELL ON THE 



most mammals. It extends from the base of the csecum onty 

 along a very small proportion of the length of that organ. In 

 addition, a layer of stout fibres, quite distinct from true mesentery 

 in appearance and relations, binds together the two limbs of the 



Text-fiaure 20. 



Intestinal tract of Equidn;. 



Slightly altered from Trans. Zool. Soc. 1905, fis;. 25. S. Cat end of intestine 

 nearest stomach. H. Cut end of intestine nearest anus. C. Cit-cum. 

 C.L. 1. Colic loop (ansa coli dextrd). M. llemnant of primitive mesentery 

 between ileum and base of csecuni. XX. Line of attacliment of the adventi- 

 tious fibres (i-emoved in the figure) which tie the ciecuni to the colic loop. 



enormous colic loop, and passes over from them to the caecum. 

 'I'his secondarj' attachment is least strong in the Rhinoceros, hut 

 in the Tapiridse and Equidje ties down the greater part of the 



