430 THE EVOLUTION OF MAN. 



lower part of the nterns the vagina. canal passes out on each side. The 

 ovai'ies and testes begin to move downward from their place of formation. 



Xin. Thirteenth Period : Urogenitals of Seyni-wpes, 



The lower parts of the Miillerian and the WolflBan ducts coalesce into 

 a sexual cord. The coalescence of the two uteri at the lower part gives 

 rise to the uterus hicornis. A part of the allantois becomes the placenta. 



XIV. Fourteenth Period : Urogenitals of Apes. 



The two uteri coalesce throughout their entire length, fonuing a single 

 pear-shaped uterus, as in Man. 



