214 



DR. P. CHALMERS MITCHELL ON THE 



approaches the duodenal region, whei'e it is attached, by a s^trong- 

 rather wide ligament, partly to the duodenum and partly to the 

 omentum. The gut tlien bends sharply round to form the 

 straiglit rectum of moderate length. 



Text-fii-ure 16. 



Intestinal tract of Hippopotamus ampJiibius. 



S. Cut end of gut nearest stomacli. R. Cut end of g-ut nearest anus. 

 C.L. 1. Colic Loop {ansa coli dextra). 



Family Suidae. Bahirussa habirussa (text-fig. 17). 



In the Swine, the duodenal region is better marked off, and 

 consists either of a single or a double loop. Meckel's tract ''is 

 very like tliat of the Hippopotamus, l)eing of even calibre, very 

 long, and disposed in closely packed minor loops. From the apex 

 the recurrent limb of the pendant loop runs dorsally a short 

 distance and then bends to enter the large cpecum, which is a, 

 forward continuation of the cavity of the hind-gut. Distad of 

 the cjecum, the pendant loop, in*the region occupied b}^ a set of 

 large folds in the Hippopotamus, is developed into a,n enormous 

 double spiral, reallj' composed of a very la.i-ge single loop, the 

 proximal limb having a, larger calibre than the distal limb. This 

 spiral, in some of the Swine, e. g., the common ing.audBaMrussa 

 is a conical mass, in shape not unlike the shell of a whelk. In 

 Phacochceriis and in Dicotyles the colic spiral was much flatter, 

 more like a coiled watch -sjjring. The hind-gut on leaving the 



