486 Prof. O. C. Marsh—Restoration of Coryphodon. 
the same specimen, and the position given in the original figure 
has been essentially retained. The smali size of the restoration 
does not permit as accurate an exhibition of the structure of the feet 
as could be desired, but the main features are clearly shown. In 
this species, the pyramidal bone (cuneiform) touches the fifth meta- 
carpal, and helps to support it, as in Dinoceras, as already shown by 
the writer. This is the rule in adult individuals of Coryphodon, 
but in young specimens the metacarpal facet on the pyramidal 
may be indistinct or even wanting, as is sometimes the case with 
weathered specimens. 
Fie. 4.—A. Frontal aspect of cranium of Dinoceras (Marsh). 
Fie. 5.—Fore foot of Dinoceras ; front view. 
Fie. 6.—Hind foot of Dinoceras ; front view. Both one-fifth natural size. 
The hind feet of Coryphodon were investigated by the writer at 
the same time as the fore feet, and figure 8, of the left pes, was 
published with figure 2, and is believed to be equally accurate. 
Being a front view, it does not fully show the relations to each other 
of the astragalus, calcaneum, and cuboid, but the other elements are 
clearly exhibited. The position first given to the figure is retained 
in the restoration after a careful investigation of the whole posterior 
limbs in a number of well-preserved specimens. These differ con- 
siderably among themselves, but the essential structure is identical 
in all. ‘The feet bones of some of these specimens are very perfect, 
and their relations to each other cannot well be misinterpreted. 
