220 



G. 



STUDY OF PIG EMBRYOS. 



Ao.D. Ptd. D.ven. V.s. Au. 



A. is. 



W.b/ 



Soni. 



V. mm . 



msth. 



FIG. 130. PIG, 9.0 MM. SAGITTAL SERIES 53, SECTION 213. 



A, Entodermal cavity (probably gall-bladder). A.is, Intersegmental artery. All, Allantois. Ao, Median aorta. 

 Ao.D, Descending aorta. Art.v, Arteria vitellina. Au, Auricle. Clo, Cloaca. Cce, Coelom. D.ven, 

 Ductus venosus. Ent, Entoderm. G, Ganglion. Glo, Glomerulus. Li, Liver, msth, Mesothelium. 

 Pul, Lung. Seg, Segment. Sow, Somatopleure. Sp.c, Spinal cord. Uin.iv' y Upper wall of umbilicus. 

 Um.w", Lower wall of umbilicus. Ve, Vein in liver. Ven, Ventricle of heart. Vil, Vlllus. V.msn, 

 Vena mesonephrica. V.p, Portal vein. V.s, Valvula sinistra. W.b' , W.b" , Wolffian body. X 22 

 diams. 



