902' 



EMBRYOLOGY. 



Fig. 429. 



BLOOD-VESSELS IN THE LIVER OF AN EQUINE F<ETDS AT MID-TERM. 



A, Umbilical vein ; B, Its anastomoses with the portal vein, c ; D, Ductus venosus 

 E, Posterior vena cava. 



Fig. 430. 



LIVER OF A LAMB AT BIRTH. 



A, Posterior vena cava ; B, Vena portaj ; c, Umbilical vein ; D, Anastomosis of 



the umbilical vein with the vena portae. 



