Page:The American Journal of Science, series 4, volume 1.djvu/519

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 11⋅3^mm, and the transverse diameter 15⋅3^mm. The grinding surface of the crown is concave, 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. Two-thirds natural size. (After Dubois.)
a, back view; b, top view.

6.

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 preservation, 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