NO. I THE WHITE RHINOCEROS HELLER 63 



PLATE 17 



(Figs. 1, 2, 3 about 1/9 natural size) 



(Fig. 4 about 1/8 natural size) 



Illustrating subspecific character of greater dorsal elevation of lambdoidal 



crests in siiiutm than in cottoni. 



Figures of skulls of simum are not reliable in relative comparisons of parts 



not in the same plane as they were made with a short focus lens. 



Fig. 1. Ceratotherium simum simum, male, adult; from South Africa; col- 

 lected by Stephens; exact locality not known. No. 51.12.23.1., 

 British Museum. 



Fig. 2. Ceratotherium si>num simum, male, adult: from South Africa; exact 

 locality not known ; specimen from a mounted skeleton on exhibi- 

 tion in the gallery of paleontology in the British Museum. 



Fig. 3. Ceratotherium simum simum, female, adult; from South Africa; col- 

 lected by Brandt; exact locality not known. No. 52.12.9.1., British 

 Museum. 



Fig. 4. Ceratotherium simum cottoni, female, old: from Rhino Camp, Lade 

 Enclave ; shot by Kermit Roosevelt. January 19, 1910. No. 164592, 

 U. S. National Museum. 



