THE STRUCTURE OF FREE-MARTIN GONADS 



93 



rete normally forms a core in the center of the testis (fig. 4). 

 In no case has the sex-cord region advanced to this condition, 

 but a definite step in that direction is seen in case H-37, and 

 toward the posterior end of gonad H-46 where the sex-cord 



Fig. 10 Transverse section through gonad, vascular plexus and epididymis 

 of free-martin, H-46. bv, blood-vessel; be, tubules of the body of the epididymis; 

 he, tubules of the head of the epididymis; r, rete tubules; s, seminiferous tubules; 

 ta, tunica albuginea; tv, tunica vasculosa; wi, 'undifferentiated tissue'; vp, plexus 

 of blood-vessels. X 11. 



region has grown around the rete to a degree such that the rete 

 no longer touches the tunica albuginea, but has shifted toward 

 the center of the gonad. Nevertheless, it is still eccentrically 

 situated with respect to the greater portion of the sex-cord 



