File:Heller, The White Rhinoceros (1913), Pl. 20.jpg

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English: Illustrating age differences in female skulls. Skulls arranged by age, the youngest at the bottom.

Angle of nasal boss increases with age, due to the production forward of the anterior border. Depth of the dorsal concavity grows less as age advances.

  • Fig. 1. Ceratotherium simum cottoni, female, old; from Rhino Camp, Lado Enclave; shot by Col. Theodore Roosevelt, January 29, 1910. No. 164595, U. S. National Museum.
  • Fig. 2. Ceratotherium simum cottoni, female, immature ; last molar not yet erupted ; from Rhino Camp, Lado Enclave ; shot by Col. Theodore Roosevelt, January 10, 1910. No. 164587, U. S. National Museum.
  • Fig. 3. Ceratotherium simum cottoni, female, immature ; last milk molars about to be shed ; weathered skull ; from Rhino Camp, Lado Enclave. No. 164599, U. S. National Museum.
  • Fig. 4. Ceratotherium simum cottoni, female, immature; milk molars in use; from Rhino Camp, Lado Enclave ; shot by Col. Theodore Roosevelt, January 15, 1910. No. 164590, U. S. National Museum.
Date
Source Heller, Edmund (1913) The White Rhinoceros, Smithsonian Institution
Author Edmund Heller (?)

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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.
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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Heller,_The_White_Rhinoceros_(1913),_Pl._20.jpg

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