72 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6 1 



PLATE 26 



(About i/io natural size) 



Illustrating age differences in nasal boss and lachrymal breadth in male skulls. 

 Skulls arranged by age, the oldest at the top. 

 Fig. I. Ccratotherium simum cottoni, male, old; from Rhino Camp, Lado 



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

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



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

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



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



U. S. National Museum. 

 Fig. 4. Ceratothcrium simum cottoni, male, immature ; from Rhino Camp, 



Lado Enclave; shot by Col. Theodore Roosevelt, January 15, 1910. 



No. 164635, U. S. National Museum. 

 Fig. 5. Ccratotherium simum cottoni, male, immature; from Rhino Camp, 



Lado Enclave ; shot by Kermit Roosevelt, January 13, 1910. 



No. 164599, U. S. National Museum. 



