PLATE 54. 



HIND FEET OF MERYCHIPPUS PROPARVULUS, EOPLACIDUS, E0HIPPAR10N. 

 ANTERIOR AND EXTERNAL VIEWS OF PES IN THREE SPECIES FROM THE PAWNEE CREEK BEDS OF NORTHEASTERN COLORADO. 



All figures one-half natural size. 



Compare with other species from the same beds, shown in Plate 53. The lateral digits are much reduced and the 

 cannon bone is slender in Merychippus coplacidus. 



Mrri/ckippus proparvulus Osborn, type, Am. Mus. 9394. Associated with 



upper jaw and part of skeleton, a, Anterior, b, external view. 

 M. coplacidus Osborn, type, Am. Mus. 9397 (reversed in drawing). Asso- 

 ciated with lower jaws and part of skeleton. Same views as 1. 

 31. cohipparion Osborn, type, Am. Mus. 9402. Associated with lower 

 jaws and greater part of skeleton. Same views as 1. 



/ 



Pawnee Creek, Col. Middle Miocene 1. 



a u a a u 



u u u u a 



330 



