DE. E. EAT LANKESTEE ON OKAPIA. 307 



As bearing on the question of the relative ages of the Brussels skull and our large 

 hornless specimen, I may say that whilst the Brussels skull shows the molars and 

 premolars in a worn condition and the incisors and canines much used, our larger skull 

 has the following dental formula : — 



Right side: i. , Q , C. ^, pm. 2 perm (not cut) l dec ^ 3 perm, (in use) 

 " 3 perm. 1 dec. ^ 8 dec. (worn) 3 perm, (m use) 



Left side : i. „ ^ , c. ,-^, pm. and m. broken away above, same as right side below. 



3 perm. 1 dec. '■ j ^ 



Our smaller skull has no lower jaw and shows three milk premolars and one per- 

 manent molar only, on each side of the upper jaw. 



In conclusion, I may say that the adult dentition resembles, so far as the molars and 

 premolars are concerned, very closely indeed that of Girqff'a, whilst no new light is 

 thrown by the new specimen on the permanent canines and incisors of which the larger 

 of Sir Harry Johnston's specimens gave us full knowledge. 



