340 



Index 



Wolffian body Continued 

 ridge: Chick, 223, 237 



Yolk: Chick, 90-92 



in relation to cleavage : 9* 



103 

 plug: Frog, 23 



sac: Chick, 116, 165 

 stalk : (see Somatic stalk) 



Yolk-sac: Mammal, 312- 

 316 



Yolk-stalk, 3 1 4-3 1 6 



Zona pellucida, 286 



