74 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



PLATE 28 

 (About 1/13 natural size) 



Illustrating form and tooth wear in mandibles of Ceratothcrium simum 

 cottoni, from Rhino Camp, Lado Enclave. 

 Arranged by age under the sexes ; oldest at the top. 



Male, old ; weathered. No. 164598, U. S. National Museum. 

 Male, adult ; weathered. No. 164596, U. S. National Museum. 

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

 U. S. National Museum. 

 Fig. 4. Male, immature; shot by Col. Theodore Roosevelt, January 15, 1910. 



No. 164635, U. S. National Museum. 

 Fig. 5. Male, immature ; shot by Kermit Roosevelt, January 13, 1910. 



No. 164589, U. S. National Museum. 

 Fig. 6. Male, young; shot by Col. Theodore Roosevelt, January 10, 1910. 



No. 164588, U. S. National Museum. 

 Fig. 7. Female, old ; shot by Kermit Roosevelt, January 19, 1910. No. 164592, 



U. S. National Museum. 

 Fig. 8. Female, old ; shot by Col. Theodore Roosevelt, January 29, 1910. 

 No. 164595, U. S. National Museum. 

 Female, old ; weathered. No. 164597, U. S. National Museum. 

 Female, immature; shot by Col. Theodore Roosevelt, January 10, 



1910. No. 164587, U. S. National Museum. 

 Female, immature ; weathered. No. 164509, U. S. National Museum. 

 Female, immature ; shot by Col. Theodore Roosevelt, January 13, 

 1910. No. 164590, U. S. National Museum. 



