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 epooph- 

 oron l formed from the degenerate 

 tubules of the mesonephros. 



The Wolffian duct persists 

 throughout life in the male, where 



m/(0d) 



A B 



Fio. 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; //<?, testis; Ig, Leydig's duct (ureter); ing, Mullerian duct 

 (oviduct in B ) ; w.v', its vestigial end in the male ; /V, functional portion of meso- 

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

 vasa efferentia (rudimentary in ). 



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 parobphoron behind the ovary, a structure of only 

 vestigial importance. 



