FIG. 216. Diagram of the relations of the main splanchnic blood vessels 

 on the sixth day of incubation. 



A. c., Coeliac artery. Adv., Vena advehens. All., Allantois. A. m., Mes- 

 enteric artery. Ao., Aorta. A. o. m., Ornphalomesenteric artery. A. p., 

 Pulmonary artery. A. sc., Sciatic artery. A. u. d., Right umbilical artery. 

 A. u. s., Left umbilical artery. A. V., Vitelline arteries. Car. int., Internal 

 carotid. Car. ext., External carotid. Cl., Cloaca. D. a., Ductus arteriosus. 

 D. V., Ductus (meatus) venosus. Int., Intestine. J. e., External jugular 

 vein. J. i., Internal jugular vein. Li., Liver. Scl., Subclavian artery. V. 

 c. a., Anterior vena cava. V. c. i., Inferior Vena cava. V. c. p., Posterior 

 cardinal vein. V. m., Mesenteric vein. V. o. m., Omphalomesenteric vein. 

 Vp., Pulmonary vein. V. s'c., Subcardinal vein. V. s'cl., Subclavian vein. 

 V. u. (s.), Umbilical vein (left). V. V., Vitelline vein. W. B., Wolffian 

 body. Y. S., Yolk-sac. Y. St., Yolk-stalk. 



