440 



FRANK R. LTLLIE 



19 



Fig. 18 Part of urinogenital system of sterile free-martin 17.5 cm. long. 

 X f. From two-sexed pair 23. The gonads are unusually rudimentary. 1, 

 gonad; 2, urinogenital fold with ducts; difficult to interpret; 3, umbilical artery; 

 4, gubernaculum ; 5, ureter; 6, allantois turned back. 



Fig. 19 Urinogenital system of sterile free-martin 17.5 cm. long; X |, From 

 two-sexed twin pair 36. The gonads are exceedingly rudimentary in this speci- 

 men; the gubernacula are present, but not as well developed as in figure 18. 

 /, kidney; 2, gonad; 3, rectum; 4, guliornaculum; 5, urinogenital sinus; 6, clitoris; 

 7, Wolffian ducts. 



