PLATE -€xX iby alr 
Miocenrg Equip#®. SKELETON OF MERYCHIPPUS 
Nomenclature 
Cope 1880-3 Revised 1915 
Hippotherium seversum (in part) Merychippus isonesus 
Hippotherium sphenodus Merychippus sphenodus 
Fies. 1-8. Merychippus isonesus Cope, 1889. Parts of skeleton with skull figured on pl. CXLVI1. 
One-half natural size. Type specimen, Amer. Mus. No. 8175, Cope Coll. Mas- 
call formation, Cottonwood Creek, John Day Valley, Oregon. 
Fig. 1. Pelvis, external view; fig. 2, 2a, femur, anterior and posterior views; 
fig. 3, 3a, tibia, anterior and posterior views; fig. 4, hind foot, dorsal view; fig. 5, 
5a, internal and external views; figs. 6, 6a, navicular, proximal and distal views; 
fig. 7, 7a, ectocuneiform, proximal and distal views; fig. 8, metatarsals and 
phalanges, internal view; 8a, 8b, proximal and distal views of metatarsus. 
Fras. 9-10. Merychippus sphenodus Cope, 1889. Upper premolars, crown view, natural size. 
Type specimen, Amer. Mus. No. 8281, Cope Coll., Pawnee Creek beds, Pawnee 
Buttes, Colorado. 
