Asexual or Bisexual Aberi'ations 



153 



in any portion of their length, but persist as contiguous, 

 solid cords. The first suggestion of sex specialization is 

 generally an excavation of the Muellerian ducts at the 

 apices of the uterine horns, as shown in Figs. 51, 52. Paral- 

 lel with this there may be some suggestion of ovarian de- 

 velopment. The next observed stage of excavation of the 

 apices of the uterine horns is the fusion and the excavation 

 of the Muellerian ducts in the area of the uterine body. The 

 cavity of the excavated uterine horns or body sometimes be- 

 comes distended with lymph, usually thin and clear. 



Fig. 48— Arrested Development of Bovine Genital Tract (Freemartin.) 

 MU, Meatus urinarius ; H, hymen ; WD. Wolffian ducts ; DM, ducts of 

 Mueller ;. DM' cross section of Mueller's ducts ; - GG, undifferentiated 

 genital gland. The anterior ends of the Muellerian Ducts, Z?y1/, between 

 the genital glands, GG, are excavated and distended with fluid. 



