26 TADACHIKA MINOURA 



Result : Gonads of the female type, but right gonad larger than 

 is normally the case; left gonad, 4.5 x 1.8 mm. ; right gonad, 2.3 x 

 0.8 mm. Wolfhan ducts more or less of the male type; miillerian 

 ducts of the female type. 



16. Embryo no. 22-9. Conditions of the experiment the same 

 as in no. 22-13. The graft grew well. Age of embryo, 19 days; 

 duration of graft, 6 days. 



Result: Gonads of the female type; left gonad 6 mm. long; 

 right gonad, 3 mm. long. Wolffian ducts of the male type; 

 miillerian ducts of the female type. 



c. Description of embryos affected by ovary grafts. 



1. Embryo no. 27-4 (figs. 25, 26). Operated May 7, 1918. 

 Piece of ovary about 1 mm. square from a chick one month old 

 was grafted on a nine-day-old embryo. Examined May 17th. 

 Graft with vascular connections, but rather small. Age of 

 embryo, 19 days; duration of graft, 10 days. 



Result: Gonads of the male type, but ducts of the female 

 type. Right gonad, 3.2 x 1.4 mm.; left gonad, 4 x 1.2 mm. 

 Gonads testis-like in appearance, but the left one much the 

 larger. Both miillerian ducts abnormal; the posterior portions 

 were distinctly differentiated as in the female; there were no 

 signs of degeneration in the ducts such as occur in normal males. 

 This embryo is typically intersexual. 



2. Embryo no. 7-3 (fig. 27). Operated August 25, 1917. 

 Piece of adult ovary grafted on a seven-day embryo. Opened 

 September 4th. Age of embryo, 17 days; duration of graft, 

 10 days. 



Result: Right gonad of the male type, 2.8 x 0.6 mm.; left 

 gonad of the female type, 3,6 x 1 mm. Left gonad considerably 

 larger than the right; its surface not smooth as in the normal 

 testis, but rough like an ovary. Ducts poorly preserved. Parts 

 of the miillerian ducts can be plainly recognized on both sides; 

 whether the typical posterior enlargement was present cannot 

 be determined, 



3. Embryo no, 7-4. Conditions of the experiment same as 

 in no. 7-3. 



