DU BOIS'S PITHECANTHROPOID. 



57 



RELICS OF THE PITHECANTHROPUS ERECTUS. 



Left femur : (i) front view, (2) outside view, (3) back view, 

 (4) from below, (5) inside view of lower end. Third upper 

 right back tooth, (6) showing surface of mastication (6a) back 



