FIGURES 8 AND 9 



8 Transverse section of 10 mm. cat embrvo (series 120, slide IX, section 25) 

 X 300. 



9 Same, section 26. 



1 Sympathetic nerve. 



68 Left postcardinal vein. 



73 Left dorsal aorta. 



77 Meseiichyinal intercellular Ij^phatic anlages. 



7S Coelom. 



