336 



THE DEVELOPMENT OF THE CHICK 



Fig. 193. — Reconstruction of the septum transversum and asso- 

 ciated mesenteries of a chick embryo of 5 to 6 days. (After 

 Ravn.) 



A. Entire. 



B. After removal of the liver. 



A., Aorta, ac. M., Accessory mesentery, cav. F., Caval 

 fold. coel. F., Cceliac fold. Her., Hiatus communis reces- 

 sum. Int., Intestine. Lg., Lung. Liv., Liver, pvl., Primary 

 ventral ligament of the liver. Sv., Sinus venosus. 



mesentery), uniting the ventral and posterior face of the liver 



to the body-wall just in front of the umbilicus (Fig. 193 A, pvl.). 



For the purposes of these figures the body-wall is cut away. 



Nevertheless, it can be seen that the pericardial cavity communi- 



