434 



FRANK R. LILLIE 



Fig 12 Normal male 26 cm. long; from twin one-«exed male pair 3; collected 

 January '^8 1915. X i Single chorion, constricted between the two foetuses. 

 This figure 'shows the entire male urinogenital system; the gubernacula have en- 

 tered the scrotal sacs. The testes are drawn into the vaginal sacs. The disposi- 

 tion of the teats for the normal male should be noted. 1 , rectum ; 2, vasa def erentia , 

 3, epididymis; 4, testis; 5, urinogenital sinus; 6. gubernaculum withdrawn from 

 scrotal sac; 7, cut end of umbilical cord; 8, prepuce; 9, wall of penial sheath, 

 10, penis; 11, vesiculae seminales; 12, teats; 13, allantois; U, gubernaculum in 

 scrotal sac ; 15, retractor nuiscle of penis. 



