Experiments in Transplanting Lnnbi 



271 



of the opposite side some little distance from the transplanted 

 limb. While it is necessary, therefore, to guard against contam- 

 ination even in these experiments, still in all the cases but this 

 one there is a very extensive nerveless region and thelimbw^hich is 

 transplanted to this is far removed from the source of extrinsic nerves. 

 The outcome of these experiments was not altogether satis- 

 factory because the limbs transplanted to the nerveless individuals 

 in no case developed rapidly and hence even after the expiration 

 of three v^eeks or more they are nothing more than mere knobs 

 (Fig. 14). The natural hind limbs of these specimens are like- 



Fig. 14 Four neneless larvae, attached to normal nurses, e, transplanted extremity. X2. 



w^ise poorly developed and it seems probable that the nutrition 

 is insufficient to provide for a normal rate of growth. By modifi- 

 cation of the method, I hope during the present season to obtain 

 more conclusive results. 



It will not be necessary to describe the individual experiments 

 in great detail. Seven cases have been examined in all. The 

 specimens were preserved two, three, five, seven, ten, twelve and 

 fifteen days, respectively, after transplantation of the limb. In 

 four of these no traces whatever of nerves could be found in the 

 transplanted limbs or anywhere near them, although at the time 



