146 Ss. R. DETWILER 
series AS6 is a very striking and unlooked-for phenomenon, and 
since all of the factors underlying reduplications are not as yet 
understood, the decrease in this series is not explicable. In a 
great many cases the anterior or disharmonic member of the 
reduplication became more functional than the posterior or 
harmonic member, which probably is accounted for by the fact 
that it was closer to the source of the nerve supply and received 
the bulk of innervation. The fact that the disharmonic members 
of the reduplicated appendages frequently functioned more 
perfectly than the harmonic members would indicate that re- 
duplication in itself can, in no wise, be adaptive. The non- 
adaptiveness is illustrated by such a case as AS4o., In which the 
posterior member of the reduplication underwent almost complete . 
atrophy, while the anterior member functioned quite perfectly, 
even though disharmonic (fig. 14). These general observations 
would well agree with those of Harrison (717), viz., that when 
innervation and vascularization are sufficient, a functional con- 
dition may arise which is independent of the harmony of the 
combination. 
Although in the autoplastic experiments there occurred a 
gradual increase in the number of reduplications as the limbs 
became transplanted farther and farther away from the normal 
situation, the reverse was found to be the case in the homoplastic 
operations; i.e., those in which an additional limb was trans- 
planted a given number of segments posterior to the normal 
intact limb (table 1b). All of these reduplicated appendages 
functioned very imperfectly. 
With the present knowledge of the factors underlying redupli- 
cations, the results obtained from these experiments are not 
entirely explicable. It would, therefore, be premature to attempt 
to discuss the results other than to state as has above been pointed 
out: that there is no evidence to indicate that reduplication is 
in any way adaptive. 
A few experiments were made in which the limbs were trans- 
planted the distance of seven segments posterior to the normal 
position. Inasmuch as very imperfect movement was observed 
in limbs of the series AS6, it appeared highly probable that 
