Penetration of melanocytes from embryonic Japanese quail peritoneum into associated embryonic avian gonads,grown on chicken chorioallantoic membrane

Summary After association on chorioallantoic membrane (CAM) of an embryonic bird testis with pigmented peritoneum from a Japanese quail embryo, numerous melanocytes penetrate in its interstitial tissue. If, instead of a testis, an ovary is transplanted under similar conditions, then the melanocytes may be found in the medulla or between the secondary sex cords at the rim of the ovary.The author is very grateful to Prof.L. Vakaet, R. U. C. A. Antwerp, for his valuable suggestions, and to MissC. Vaniioecke for her technical assistance.