HORMONES IX DIFFERENTIATION OF SEX 



109 







fel!t".^*.Z '" WS *3i?^~ k' 





l't%^ 



.♦3^"* 



*A-. \"%. 



^Mj 



Fig. 2.20. A. View at higher magnification (X 1000) of the cortex of ;i traiisiorme.l te.stis 

 containing gonia, and other germ cells showing the early meiotic prophase stages of young 

 ovocytes. B. Cortex of another transformed testis of the same experimental group showing 

 the formation of primordial follicles (X 1000). 



by the testis hormone. For this there is no 

 direct evidence; however, in typical ovo- 

 testes, with a well developed cortex, the 

 tubular elements may also at times be very 

 well preserved but the interstitium is de- 

 generate. This interpretation does not re- 

 quire positive stimulation by the female 



hormone to promote cortical differentiation, 

 but it does not exclude the possibility that 

 this may occur. The germinal epithelium of 

 transformed testes is strongly hypertrophied 

 in comparison with that of normal ovaries 

 of the same age (Figs. 2.18B, 2.195, and 20) , 

 a condition which is seen also in the ovaries 



