EMBRYO OF 9 MM. STUDIED IN SECTIONS. 



251 



Ao.D. Pul. V.h.c. V.s. Au. 



A. is 



W.b. 



msth. 



Cce. 



V.msn 



FIG. 184. PIG, 9.0 MM. SAGITTAL SERIES 53, SECTION 213. 



A. is, Intersegmental artery. All, Allantois. Ao, Median aorta. Ao.D, Descending aorta. Art.v, Arteria 

 vitellina. Au, Auricle. Clo, Cloaca. Cue, Ccelom. Ent, Entoderm. G, Ganglion. G.b, Gall-bladder. 

 Glo, Glomerulus. Li, Liver, msth, Mesothelium. Pul, Lung. Seg, Segment. Som, Somatopleure. Sp.c, 

 Spinal cord. Um.w', Upper wall of umbilicus. Um.w", Lower wall of umbilicus. Ve, Vein in liver. Yen, 

 Ventricle of heart. V.h.c, Vena hepatica communis. Vil, Villus. V.msn, Vena sub-cardinalis. V.p, Portal 

 vein. V.s, Valvula sinistra. W.b', W.b", Wolffian body. X 22 diams. 



