6o 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



PLATE 14 



(About natural size) 



Fig. i. Coelodonta antiquitatis, 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. 

 Fig. 2. Ceratothcrium 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 iMuseum. 



Brachiocephalic; lambdoidal crests not projecting beyond con- 

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



