PLATE 5 



EXPLANATION OF FIGURE 



6 Reconstruction of a 6 mm. Tragulus embryo. Collection No. 205. X 100. 

 Showing the region of the sub-hepatic sinus in ventral view. 5, post-cardinal 

 vein; 6, umbilical vein ; 7, umbilico-post-cardinal plexus; 9, omphalo-mesenteric 

 vein; 11, sub-hepatic sinus; 12, sub-cardinal vein; 13, Wolffian duct; 15, Sinus 

 venosus; 16, intestine; 24, aorta. 



230 



