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 
Fic. 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 
