DIGESTIVE TRACT OF THE CAT. 9 



is chiefly responsible for the presence of the intestines in the 

 cavity of the umbihcal cord. 



Although the sections demonstrate this point clearly, 

 they fail to give us as complete an understanding of the 

 relations of the different viscera within the abdominal cavity 

 proper at this particular stage of development, as can be 

 obtained by the dissection of an embryo. 



Fig. 4. 



The veutral wall removed from an embryo 17| mm. (Enlarged 10.6 diam- 

 eters.) Z., liver, e/., jejunum. C, colon, c. ex^., coils extra-abdominal. 0., 

 omentum. Sp.^ spleen. 



Fig. 4 represents the abdominal cavity of an embryo 17| 

 mm. after the removal of the ventral wall. 



The enormous size of the liver is its most striking 

 feature, together with the coil of intestine which was situ- 

 ated within the cavity of the umbilical cord. A stretch of 



