DICHOTOMY. 



107 



terminal phalanx, furnished with a rudimentary nail, 

 attached by a slender pedicle to a well-formed finger. 

 These rudimentary digits may be attached to the side 

 of the terminal phalanx, but sometimes swing from the 

 side of the first or proximal phalanx. It was this form 

 of supernumerary digit which Darwin erroneously be- 

 lieved was reproduced after removal. Dichotomy of 



FIG. 54. The right antler of a Moose with reduplicated palm. 



the finger may be equal but incomplete ; it then gives 

 rise to the malformation shown by the thumb (fig. 55). 

 When the process is complete, two perfectly distinct 

 thumbs result. Such reduplication is not necessarily 

 confined to a finger or a thumb, but may affect several 

 digits of the same hand or foot. Jonathan, son of 

 Shimeah the brother of David, slew at Gath a man 



