CHAP. VI] THE DENTAL SYSTEM OF THE PRIMATES 261 



Since examining the specimens at Munich I find that Selenka 

 in describing his collection has commented upon the remarkable 

 frequency of the occurrence of additional molar teeth in male 

 Orang-utans. Selenka states ("Rassen und Zahnwechsel des 



Fig. 195. 



Fig. 196. 



Fig. 195. Mandible of an Orang-utan (ad. 3 ) with an accessory molar tooth 



(marked x ) on the right side. (Hose Donation II. Mus. Anat. Cant.) 



Fig. 196. Accessory teeth in the maxilla of an Orang-utan. (Selenka Coll., 

 Munich.) 



Orang-utan," Sitz. der kais. preuss. Akad., Berlin,. 1896) that the 

 anomaly occurs in 20 / o of male crania. Other remarkable in- 

 stances of supernumerary molar and other teeth in the Orang- 

 utan are recorded in a paper by Hrdlicka (Proc. United States 

 Nat. Museum, Vol. xxxi., especially p. 558, Figs. 6 and 7). 



