^ Fig. 8 



Figs. 8, 9. — Sectional view of two earliest embryos of the armadillo. 

 The two are shown overlapping, to save space. (For description see 

 text, stages I and II.) The trophoblast (/r) and inner-cell mass {ic m), 

 ectoderm {ec), and endoderm {en) are shown. The point A'' is the 

 apical pole of the egg. (Modified from Patterson.) 



Fig. 9 



