/ 



; 1^8 Object and Function of the Egg-stalk, 



I when we remove a freshly laid ^^% from a bud, to be 



' further examined in the damp chamber. Although 



I have frequently observed this occurrence in the egg- 

 stalk, I am unable to explain it more clearly. This 

 much is certain, that it is a phenomenon of great im- 

 portance, and it is only after it has taken place, that eggs 

 kept in the damp chamber are observed to undergo 

 the various stages of embryonic development. But 

 I have never succeeded, no matter how careful the 

 precautions adopted, or what the modifications under 

 which I carried out the experiment, in bringing an ^^^^ 

 to perfect development, after removal from the ovary 

 of a parthenogenetic fly. 



