27. The Form and Dermatoglyphs of the Hands and Feet of certain Anthropoid Apes



  • 1The general form, crease-line, and papillary-ridge system of the hand and foot of twelve chimpanzees are described.
  • 2A new method for obtaining prints of hands and feet has been devised, with the aid of brilliantine and crude dioxide of copper.
  • 3A marked age change in the crease-line system occurs in chimpanzees. This proceeds in opposite directions in the extremities, but in both cases the resemblance to man is diminished. In the palm numerous new longitudinal crease-lines are formed, while in the sole the secondary transverse lines disappear, notably in the ball of the big toe.