72 



BENJAMIN H. WILLIER 



In the dense connective-tissue fibers which have penetrated 

 the sex-cord region of gonad H-40, islands of sexual cords and 

 interstitial cells are frequently found, and occasionally isolated 

 sexual cords embedded in the dense fibers. These isolated sexual 

 cords, the islands of sexual cords and interstitial cells, and the 



Fig. 2 Transverse section through the middle of free-martin gonad, H-40. 

 bv, blood vessels; m, areas of interstitial cells and sexual cords; s, seminiferous 

 tubules; rt, rete tubules; ta, tunica albuginea. X 14. 



crescentic area (mentioned above) constitute the sex-cord region 

 (fig. 2, s, m). The interstitial cells are abundant, but the sexual 

 cords are comparatively few in number and of small size. The 

 sexual cords are characterized by thickened connective-tissue 

 walls, within which is a syncytium of supporting epithelial cells. 

 This syncytium is free from germ cells. Such a syncytium is 

 formed by the coalescence of a number of supporting epithehal 



