The Umbilical Vein in the Fectus runs obliquely upwards, backwards, and to the right side, in the posterior or free margin of the falciform ligament of the liver: having arrived in the umbilical or horizontal fissure of this gland, it sends several branches to its left lobe, and one or two small ones to the lo-bulus quadratus; then continuing its course backwards, it receives the left branch of the vena portae; after having communicated with this branch, it passes between the Spigelian and left lobes of the liver, and in this part of its course receives the name of the ductus venosus, which terminates finally in the inferior cava, or left hepatic vein.