SUBORDER D 



ARTTODACTYLA 



173 



Lower jaw low behind, elongated. Upper Eocene ; France and England. 

 C. parisiensis Blainville. 



Fig. 233. 



Dinohyus hoUandi Peterson. Lower Miocene, Nebraska. Restored slveleton. i/og. (After Peterson.) 



Reproduced by ■permission from The Memoirs of the Carnegie Museum. 



Achaenodon Cope ( ? Parahyus Marsh) (Fig. 231). Skull bear-like. Incisors 

 and canines of the full number, conical. Molars quadritubercular ; premolars 

 trenchant, monocuspid. Eocene ; Bridger and Uinta formations, Wyoming. 

 A. insolens Cope. A. robustus a 



Osborn. 



Protelotherium Osborn. 

 Three superior premolars, 

 superior molars quinque- 

 tubercular. Zygomatic 

 arch without process. 

 Frontal broad. Tetra- 

 dactyl. Upper Eocene ; 

 Uinta beds. P. uintense 

 Osborn. 



Elotherium Pomel (En- 

 telodon Ay mar d ; Archaeo- 

 therium Leidy) (Fig. 232). 

 Superior molar quinque- 

 tubercular, three cusps 

 being in the anterior half 

 of the tooth. All molars with strong basal cingulum. Last inferior molar 

 without talonid. Zygomatic arch very well developed, with descending 

 process. Mandible also with protuberances on anterior part of lower border. 

 Extremities always with two digits. American species show fourteen 

 dorsal and six lumbar vertebrae. The osteological details harmonise on the 



Palaeochoe.rus meisneri Meyer. Lower Miocene, Ulm, Wiirttemberg. 

 A, Upper, and B, lower, cheek teeth, i/'j. 



