REGENERATION 181 



experiments in an attempt to analyse the complex of determ- 

 ining factors that originates in the wound. They transplanted 

 either only musculature or only skeleton from fore-limb into 

 hind-limb, from tail into limb, from upper arm into forearm, 

 and vice versa. After this, they amputated the part in question. 

 During regeneration they found that both muscle grafts and 

 skeleton grafts influenced the nature of the regenerate. They 

 concluded that the determination of the regenerate is brought 

 about by the co-operation of the various transected organs 

 in the wound. 



Trampusch concluded on the basis of his experiments (p. 176) 

 that the skeleton is important in particular for the longitudinal 

 growth of the regenerating limb, and the muscle tissue for its 

 increase in girth, but that the skin is the most important 

 organiser for the shape of the regenerate. 



Summarising the foregoing, we can say that in many respects 

 the phenomena of regeneration show a parallel to those of 

 embryonic development, but that in a number of respects we 

 have found new relationships here. These throw some light 

 from a fresh angle on the problem of the organisation-field. 

 We may expect a deeper insight into the laws governing devel- 

 opment from the further analysis of these phenomena. 



