THE EFFECTS OF CASTRATION 



149 



place the ovary of a female, while it was still in a very 

 immature condition. The caterpillar underwent its 

 usual growth, changed to a chrysalid, and then to a 

 moth. The moth showed the characters of the .male. 

 The presence of the ovary had produced no effect what- 

 ever on the body character of the individual. When 

 this individual was dissected, Meisenheimer found that 

 the ovary had completely developed. It contained 

 mature eggs, and the ovary had often established con- 

 nection with the outlets of the male organs that had 



FIG. 75. Testes of Lymantria (Porthetria) dispar transplanted to female. 

 They have connected with the oviducts. (After Kopec.) 



been left behind, as seen in Fig. 74, taken from Kopec's 

 description. 



The converse experiment was also made. The ovaries 

 were removed from young caterpillars, and in their 

 place were implanted the male sex glands from a young 

 male caterpillar. Again no effects were produced on the 

 moth, which showed the characteristic female size and 

 color. On dissection the testes were also found to have 

 grown to full size and to have produced spermatozoa 

 (Fig. 75). 



These remarkable results, confirmed by Kopec, show 



