SMITHSONIAN M ISCEl LANEOUS COLLECTIONS 



VOL. 60, NO. 27, PL. 1 



[MO. LI 



Upper Chei k Teei h of I'.u rotkacus oryx 



Fig. i. Crown view. Fig. ia. Outer view. Mo. [62015 



Y$ nat. size 



Fio 



Fie. 2a 



Upper Cheek-Teeth of Taurotragus americanus Type 



Fig. _> Crown view. Fig. 2a. Hutu- view. No. 7622 U. S. N. M. 



' 1 nat. size 



