NO. I 



THE WHITE RHINOCEROS HELLER 



6 9 



PLATE 23 



(About yi natural size) 



Illustrating age differences in nasal boss development between both sexes 

 and also individual variation in zygomatic breadth. 



Fig. 1. Ceratotherium simum cottoni, male, adult; from Rhino Camp, Lado 

 Enclave ; shot by Kermit Roosevelt, January 20, 1910. No. 164593, 

 XJ. S. National Museum. 



Fig. 2. Ceratotherium simum cottoni, male, immature; last milk molars still 

 in use; from Rhino Camp, Lado Enclave; shot by Col. Theodore 

 Roosevelt, January 15, 1910. No. 164635, U. S. National Museum. 



Fig. 3. Ceratotherium simum cottoni, female, immature; last milk molars still 

 in use, but premolars not yet in tooth line; from Rhino Camp, 

 Lado Enclave; weathered skull. No. 164599, U. S. National 

 iMuseum. 



Fig. 4. Ceratotherium simum cottoni, female, adult; from Rhino Camp, Lado 

 Enclave; shot by Col. Theodore Roosevelt, January 21, 1910. 

 No. 164594, U. S. National Museum. 



