PLATE 8 



EXPLANATION OF FIGURES 



25 Embryo no. 27-4, modified by ovary graft. X 3. 



26 Diagram of the urinogenital system of the same embryo. 



27 Embryo no. 7-3, modified by ovary graft. X 3^. 



28 Embryo no. 2-5, modified by ovary graft. X 4. 



56 



