from the Tertiary of Java. 



481 



The tooth, the first specimen found, is represented in figure 

 4, below. It is the last upper molar of the right side, and is in 

 good preservation. It indicates a fully adult, but not very old, 

 animal. The crown is subtriangular in form, with the corners 

 rounded, and the narrowest portion behind. The antero- 

 posterior diameter of the crown is ll'3 mm , and the transverse 

 diameter 15'S mm . The grinding surface of the crown is con- 

 cave, and less rugose than in existing anthropoid apes. The 

 diverging roots are a simian feature. 



4. 



Figure 4. — Third right upper molar of Pithecanthropus erectus. 

 natural size. (After Dubois.) 

 a, back view ; &, top view. ' 



Two-thirds 



Figure 6. — Restoration of the skull of Pithecanthropus erectus. Two-fifths 

 natural size. (Reduced from a figure by Dubois.) 



c, sutura coronalis ; l, sutura lamboidea ; o, foramen occipitale. 



The femur, which is from the left side, is in fair preserva- 

 tion, although it was somewhat injured in removing it from 

 the surrounding rock It belonged to a fully adult individual. 

 In form and dimensions, it resembles so strongly a human 

 femur that only a careful comparison would distinguish one 



