NO. I THE WHITE RHINOCEROS HELLER 65 



PLATE 19 



(About y% natural size) 



Illustrating age differences in male skulls. Skulls arranged by age, the 

 oldest at the top. 



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

 Enclave ; weathered skull. No. 164598, U. S. National Museum. 



Fig. 2. Ceratotherium simum cottoni, male, adult; from Rhino Camp, Lado 

 Enclave; weathered skull. No. 164596, U. S. National Museum. 



Fig. 3. Ceratotherium simum cottoni, male, adult; from Rhino Camp, Lado 

 Enclave ; shot by Kermit Roosevelt, January 10, 1910. No. 164593, 

 U. S. National Museum. 



Fig. 4. Ceratotherium simum cottoni, male, immature ; last milk molars about 

 to be shed ; from Rhino Camp, Lado Enclave ; shot by Col. Theo- 

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

 Museum. 



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