PLATE 14 



UPPER AND LOWER TEETH OF MERYCHIPPUS FROM THE SHEEP CREEK BEDS, NEBRASKA. 



Comparison of three species from Sioux County, Nebraska. The upper teeth of the Sheep Creek specimens of Mery- 

 chippus are compared in crown view on Plate 13, the limbs and feet on Plates 41, 45, 46, 52. 



All figures natural size. 



Sheep Creek, Middle Miocene 1. Merychippus isonesus quintus Osborn, type, Am. Mus. 14185. Crown view of 

 Nebr. these teeth is given on Plate 13. 



" 2. Merychippus isonesus primus Osborn, type, Am. Mus. 14187. Upper teeth, outer 



view. Crown view of these teeth is given on Plate 13. 

 " 3. Merychippus isonesxis tertius Osborn, type, Am. Mus. 14180. Outer view of upper 



and lower dentition. Crown view of upper teeth on Plate 13. 

 " 4. Merychippus isonesus primus Osborn, type, Am. Mus. 14187. Lower teeth. Crown 



and outer views. 



250 



