832 



THE MAMMALIAN EMBRYO. 

 Fig. 107. 



[chap. 



Transvbese Section through the Head op a Rabbit of 

 THE SAilE AGE AS FiG. 106 B. (From Kalliker.) 



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



rf. medullary groove ; mp. medullary plate ; no. medullary fold ; 

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

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



