386 



THE DEVELOPMENT OF THE CHICK 



FIG. 223. Profile reconstruction of the Wolffian 

 duct and primordium of the metanephros of a 

 chick embryo of 6 days and 8 hours. (After 

 Schreiner.) 



XXV to XXXIII, twenty-fifth to thirty-third 

 somites. Al. N., Neck of allantois. Cl., Cloaca. 

 Int., Intestine. MVn., Mesonephros. n. T., 

 Nephrogenous tissue of the metanephros included 

 within the dotted lines. W. D., Wolffian duct. 

 Ur., Ureter. 



