THE URIXOGEXITAL SYSTEM 355 



of the mesonephros are formed (Fig. 219). During its growth 

 forward a series of small diverticula arise from its wall and extend 

 dorsally (F.g. 223); these branch secondarily in a generally dichot- 



^'1 ^f ■ ~ '^^''^"t?^'^^ section through the metanephros, mesonephros 

 gonads and neighboring structures of an 11-day male chick. ''""'P^^°^' 



lorn?: ^<k.^t^^ r^^ ^^ 1^^%^^: W Body-walL Coel., Coe- 



duct. M's't., Mesentery ' M^n Met^neXof^n '^^""'^V"^ ^^^^l"^^'^^ 

 tr. Pr., Transverse Drore^^ nf \hJ ^'^^^'^"^P^^fos. Sp., Spme of neural arch. 



W.D.; Wolffian d"cr'=SL°/abte"vS^L?*beL" '- ''^"'^ <''^™ '"f*'™^- 



