POSTSCRIPT. 
It should have been observed that the reference of Antilope torticornis, Aymard, 
to Palceoreas is on the authority of M. P. Thomas (‘ M&n. Soc. G£ol. France.’ ser 3. 
vol. III. art. 2. p. 16), and that it is referred by M. Dep^ret in the passage quoted in 
the text to Tragelaphus. According to Prof. Riitimeyer’s description (‘ Die Rinder 
der Tertiar-Epoche, etc.’ p. 85) the molars of this form are very similar to those of 
Strepsiceros (?) falconeri. Since the text was in type the writer has noticed that a 
tooth from the ‘ Bohnerzgruben ’ of Wiirtemberg has been described by Prof. 
Rutimeyer (see p. 88 of the work cited) as Hippotragus fraasi. If this determination 
and the reference of A. torticornis to Tragelaphus rather than to Palceoreas be correct, 
there is evidence of the occurrence of two existing African genera of antelopes in 
the tertiaries of Europe. 
