PLATE XXIV 



Fig. I 



Fig. 2 



B 



Fig. I. Skull of Ouohippidiiim ; pf, preorbital depression. 



Fig. 2. Crown surfoces of right upper molar teeth of Equus 

 (A and D), Hippidiuin (C), and Hippanon (E). A and 

 Bare almost unworn, a, anterior; /', posterior pillar. 



