UROGENITAL ORGANS. 



129 



known as Gartner's duct, and in front where it comes in con- 

 nection with a small body known as the parovarium or epodph- 

 oron^ formed from the degenerate 

 tubules of the mesonephros. Ht-tf^ 



The Wolffian duct persists 

 throughout life in the male, where '^^^mafod) 



Fig. 136. Scheme of urodele urogenital system based on Triton, from Wied- 

 ersheim after Spengel. A, male; B, female, a, excretory ducts; GN, sexual 

 part of mesonephros; Ho, testis; Ig, Leydig's duct (ureter); mg, MuUerian duct 

 (oviduct in B") ; mg' , its vestigial end in the male ; N, functional portion of meso- 

 nephros ; Ov, ovary ; Ot, ostium tubse ; Ve, vasa efferentia ; + collecting duct of the 

 vasa efferentia (rudimentary in B^. 



it acquires new functions. Here the anterior end of the 

 mesonephros loses its excretory powers, and enters into con- 



1 In amniotes, where the whole mesonephros degenerates, the posterior portion of the 

 Wolffian body in the female forms a paroophoron behind the ovary, a structure of only 

 vestigial importance. 



