558 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxi. 



females and the latter also approach more the human form. In some 

 of the females (as, for instance. No. 142170) the upper molars diminish 

 ver}^ perceptibly from the first to the third and are also not far from 



Fig. Ci.— Mandible of male orang (Cat. No. 142199 U.S.N.M.), shcwing fovr trve molars ox the 



LEFT AND FIVE OX THE EIGHT SIDE. 



human teeth in size (maxinuim length of the three -superior molars 

 3.25 cm., mean in two average men 3.2 vm.v maxinnxm breadth 1.35 

 cm., mean in two men 1.25 cm.) (tig. 5)." 



In a number of the specimens are found supernumerary teeth, while 



« See also fig. 13, in Gaudry, Sur la similitude des dents de I'homme et de quelques 

 animaux, L' Anthropologie 1901, p. 93. 



