PLATE 5 



TEETH AND FEET OF MIOHIPPUS, KALOBATIPPUS, ANCHITHERIUM, HYPOHIPPUS. 

 COMPARISON OF THE TEETH AND FEET OF THE OLIGOCENE AND MIOCENE ANCHITHERES. 



All figures natural size, except 12 and 13 which are one-half natural size. 



Figs. 1-9. Last lower molar of Miohippus sp. div., Kalobatippus, Anchitherium, and Hypohippus, showing the reduced 

 third lobe, or hypoconid, in the two latter genera. 



Figs. 10-11. Upper teeth of Kalobatippus Osborn and of Anchitherium, showing the reduction of m 3 and closing of 

 the postfossette in Anchitherium, greater antero-posterior elongation of the teeth, and more perfected lophodonty. 



Figs. 12-13. Metatarsals of Kalobatippus Osborn and of Anchitherium, showing the relative slenderness of the 

 former but with unreduced lateral digits. 



John Day, Ore. ' 

 Middle John Day, Ore. 



Upper Oligocene 1. 



Upper John Day, Ore. Lower Miocene 

 Lower Harrison, Agate, Nebr. " 

 Georgensgmund, Bavaria. Middle Miocene 



Pawnee Creek, Col. 

 Upper John Day, Ore. 

 Sansan, France. 

 Upper John Day, Ore. 

 Sansan, France. 



5. 

 6. 

 7. 

 8. 



« « g 



Upper Oligocene 10. 

 Middle Miocene 11. 

 Upper Oligocene 12. 

 Middle Miocene 13. 



Miohippus longicristis Cope, Am. Mus. 7268, referred specimen. 

 M. quartus Osborn, Amer. Mus. 7293, referred specimen (reversed 

 in drawing). 



M. brachylophus Cope, Am. Mus. 7281, referred specimen. 



M. equiceps Cope, Am. Mus. 7287, referred specimen, unworn molar 



(reversed in drawing). 

 M. equiceps Cope, type, Am. Mus. 7261, partly worn molars. 

 Kalobatippus prwstans Cope, type, Am. Mus. No. 7269. 

 K. agatensis, type, Am. Mus. 14211 (reversed in drawing). 

 Anchitherium aurelianense, Am. Mus. 10746, referred specimen 



(reversed in drawing). 

 Hypohippus osborni Gidley, type, Am. Mus. 9407. 

 Kalobatippus prwstans Cope, type, Am. Mus. 7269. 

 Anchitherium aurelianense Cuv. (drawn from Kowalevsky's figure). 

 Kalobatippus prwstans Cope, type, Am. Mus. 7269. 

 Anchitherium aurelianense (drawn from Kowalevsky's figure). 



232 



