6o SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



PLATE 14 



(About J /$ natural size) 



Fig. i. Coelodonta antiqititatis, adult; from the Pleistocene of the Tunguska 

 River, Siberia. No. 6053, U. S. National Museum. 



Nasal boss elongate, supporting a compressed frontal horn ; 

 lambdoidal crests truncate. 

 Fir,. 2. Ceratotherium simum cotioni, female, old; from Rhino Camp. Lado 

 Enclave ; weathered skull. No. 164597, U. S. National Museum. 



Front edge of nasal boss truncate; lambdoidal crests deeply 

 emarginate. 

 Fig. 3. Diceros bicomis, male, old; Loita Plains, Southern Guaso Nyiro, 

 British East Africa; shot by Col. Theodore Roosevelt, June 18, 

 1909. No. 162930, U. S. National Museum. 



Brachiocephalic; lambdoidal crests not projecting beyond con- 

 dyles ; front edge of nasal boss rounded. 

 Fig. 4. Rhinoceros unicornis, immature, milk molars in use; from the 

 menagerie of Barnum and Bailey; sex and origin unknown. 

 No. 16251, U. S. National ,Museum. 



Brachiocephalic; lambdoidal crests not projecting beyond con- 

 dyles ; nasal boss slender, terminating in an obtuse angle. 



