PLATE CXLVIL 
Miocene Equip®. SKULL AND Bones or MERYCHIPPUS 
Nomenclature 
Cope 1880-3 Revised 1915 
Hippotherium seversum (in part) Merychippus isonesus 
Fias. 1-8. Merychippus isonesus (Cope, 1889). Skull and parts of skeleton, figured also on 
pl. CXLVIII. All one-half natural size except fig. 16. Type specimen, Amer. 
Mus. No. 8175, Cope Coll. Mascall formation, Cottonwood Creek, John Day 
Valley, Oregon. 
Fig. 1, 1a, skull, lateral and palatal views; fig. 1b, two upper molars, m!~? 
of the right side, natural size; fig. 2, 2a, atlas, superior and posterior views; fig. 
3, sacrum, inferior view; fig. 4, pelvis, inferior view; figs. 5, 6, proximal and 
distal views of femur; figs. 7, 8, proximal and distal views of tibia; fig. 9, inferior 
view of astragalus. 

