PEA TE -Ciek 
Miocene Equip®. SKELETON Parts oF MrERYCHIPPUS 
Fias. 1-14. Merychippus sejunctus Cope, 1874. Skeletal parts of type specimen, skull figured 
on pl. CL. All one-half natural size, Amer. Mus. No. 8291, Pawnee Creek beds, 
near Pawnee Buttes, Colorado. 
Fig. 1, lower jaw, superior view; fig. 2, 2a, atlas, superior and inferior views; fig. 
odontoid 2b, process of axis; fig. 3, 3a, third cervical vertebra, inferior and posterior 
views; fig. 4, 4a, seventh cervical, anterior and inferior views; fig. 5, 5a, first dorsal, 
anterior and lateral views; 6, 6a, 6b, 6c, humerus, anterior, external, proximal 
and distal views; 7, 7a, 7b, tibia, anterior, external and distal views; figs. 8-14, 
hind foot, anterior and external views, 8b, inferior view of astragalus, 8c, 9b, of 
caleaneum and astragalus, 10b, proximal view of navicular and cuboid, 11b, 11c, 
proximal and distal views of metatarsus, 12b, proximal view of proximal phalanx; 
13b, of second phalanx, 14b, 14c, proximal and inferior views of ungual phalanx. 
The humerus and tibia here figured were found in the Cope Collection with 
No. 8251, a specimen which Cope referred to Protohippus perditus, and which is 
now (1913) referred to Merychippus ? sphenodus. It appears probable that parts 
of the type skeleton of No. 8291 had become mixed with No. 8251, but the two 
individuals are §0 closely allied specifically that I am unable to clear up the 
confusion, 

