332 



THE MAMMALIAN EMBRYO. 

 Fio. 107. 



[CHAP. 



/f*% 



Teansvekse Section through the Head of a Kabbit ov 

 THE SAME AGE AS FiQ. 106 B. (From Kelliker.) 



B. is a more highly magnified representation of part of A. 



rf. medullary groove ; m^. medullary plate ; rw. medullary fold ; 

 A. epiblast ; dd. hypoblast ; dd'. notoohordal thickening 'of 

 hypoblast ; sp. undivided mesoblast ; hp. somatic mesoblast ; 



