..(IP 



Or.. 



.Ov 



.. GP 



After Steiuach 



PLATE I. FEMINIZED GUINEA-PIGS 



Fig. 1. Normal male guinea-pig. Fig. 2. Feminized male guinea-pig. Bw, nipple; GP, 

 glans penis ; Ov, position of implanted ovary ; Wh, areola. 



