LATER DEVELOPMENT OF VASCULAR SYSTEM 373 
— VPNs. 
Files, 
~ KC ps.(V22) 
Fic. 214. — Reconstruction of the venous system of a sparrow embryo, 
corresponding to a chick of about 14 days. (After Miller.) 
V. e.1. H., Intra-hepatie part of the vena cava inferior. V. e. i. SC 
Part of the vena cava inferior derived from the subeardinal vein. V. v. g 
Bo.) 
Genital veins. V.i. e. d., s., Right and left vena iliaca externa. V. i. 1, 
Vena iliaca interna. V.i. 1. d., s., Right and left vena intervertebralis lum- 
balis. V.r.m.d.,s., Right and left great renal veins. 
>) 
almost exclusively, the pulmonary veins being very rudimentary 
at this stage. The veins entering the sinus venosus are the ducts 
of Cuvier, and the meatus venosus. The former are made up 
on each side by (1) the anterior cardinal vein, returning blood 
from the head, (2) the posterior cardinal vein returning blood 
from the veins of the Wolffian body, and the intersomitie veins, 
(3) the umbilical veins returning blood mainly from the body- 
