ACTION OF SEX HORMONES IN FOETAL LIFE 



437 



Fig. 15 Sterile free-martin 15.5 cm. long- X f. From two-sexed pair 37. 

 Collected January 25, 1916. Gubernacula are developed as typically as in a 

 male (figs. 10 and 11). Gonads small. Ducts also appear as in male. 1, gonad; 

 2, gubernaculum ; 3, urinogenital sinus; 4, clitoris; 5, Wolffian ducts; 6, umbilical 

 artery; 7, allantois. 



THE JOURNAL OF EXPERIMENTAL ZOOLOGY. VOL. 23, NO. 



