THE FEMALE REPRODUCTIVE ORGANS. 245 



presence of a number of the rudimentary canals which constitute the 

 lower atrophic segment of the Wolffian body produces the obscure 



G 



G 



Diagrams illustrating development of sexual organs. In all figures W, Jtf, B, and G represent 

 respectively Wolffian duct, MUllerian duct, bladder, and gut. A , indifferent type containing funda- 

 mental parts: s, sexual gland; t,t' , t", Wolffian tubules constituting anterior (pronephros), middle 

 (sexual), and posterior (rudimentary) groups ; those of sexual division retain their communication 

 with Wolffian duct. B, male type : T, testicle ; e, e', tubes of globus major derived from middle 

 Wolffian tubules ; v, tube of epididymis, the persistent Wolffian duct ; s, seminal vesicle ; /, para- 

 didymis; hi ', unstalked hydatid ; ', uterus masculinus, the persistent pans of the MUllerian duct 

 (Af); h, stalked hydatid; g, Cowper's glands; m, penis; K, kidney. C, female type : O, ovary; 

 P, parovarium ; p' , paroophoron ; W, Gartner's duct when present ; _/", firnbria ; o, oviduct ; u, 

 uterus ; v, vagina ; A, stalked hydatid ; ^ kidney. (Modified after Wiedcrsheint.) 



paroophoron, the homologue of the paradidymis. The greater 

 part of the Wolffian duct atrophies in the female ; when it persists 

 as a pervious canal it becomes the duct of Gartner. 



Male. 



Testicle. 



Tubules composing glo- 

 bus major. 



Paradidymis. 



Tube of epididymis and 

 vas deferens. 



Stalked hydatid. 



Sessile hydatid represent- 

 ing fimbria. 



Uterus masculinus. 



Usually undeveloped. 



Bladder and first part of 

 urethra. 



Remaining parts of ure- 

 thra. 



Cowper's glands. 



Penis. 



Scrotum. 



Indifferent Type. 

 Sexual gland. 

 Wolffian tubules. 



Wolffian duct. 



Duct of pronephros. 

 MUllerian duct. 



Lower segment of allan- 



tois. 

 Uro-genital sinus. 



Genital eminence. 

 Genital ridges. 



Female. 



Ovary. 



Short tubules of parova- 

 rium. 



Paroophoron. 



Head-tube of parovarium. 

 Gartner's duct when 

 persistent. 



Stalked hydatid. 



Oviduct. 



Uterus. 

 Vagina. 

 Bladder and urethra. 



Vestibule. 



Bartholin's glands. 



Clitoris. 



Labia majora. 



