Prof. O. OC. Marsh—Restoration of Coryphodon. 485 
this statement, also, to be wrong, as the calcaneum covers about 
half the cuboid.” This fact was clearly stated in the text when 
the figure was first published. The “unique caudal appendage ” 
described by Prof. Osborn (p. 120), and the suggestion in regard 
to its use, do not require special notice here. The above points 
will be discussed later in the present article. 
Restoration of Coryphodon hamatus. 
_ After the above brief review of the more important literature 
relating to the Coryphodont mammals found in America, the main 
object of the present article, the restoration of one species of 
Coryphodon, may be considered. In Plate XVIII. this restoration is 
given one-twelfth natural size. The position shown was chosen 
after careful consideration, and is believed to represent fairly one 
naturally assumed by the animal in life, when standing at rest. 
The figure represents a fully adult individual of one of the largest 
species of the genus, which, when alive, was nearly six feet in 
length, and about three feet in height. 
The basis of this restoration is the type specimen of Coryphodon 
hamatus, and this was supplemented by other remains which 
appeared to be specifically identical. A large number of such 
specimens were available, some of them in excellent preservation. 
For parts of the skeleton where such remains were wanting, 
specimens from nearly allied forms were used, but no serious error 
can thus result. In these remains, the caudal vertebra were seldom 
preserved in good condition, and although a sufficient number of 
such specimens from different individuals were at hand, the exact 
number in the present species could not be determined, and hence 
the vertebree of the tail are left in outline. 
No clavicles are represented in the restoration, and no evidence 
of their existence has been found by the writer in the many remains 
investigated. The specimens described by Prof. Cope as clavicles 
of Coryphodon probably do not pertain to that genus. A bone 
very similar in shape to the supposed clavicles was figured by 
him as the fifth metatarsal, in the first diagram he published of 
the hind foot of Coryphodon. The same figure has three phalanges 
in the first digit, and the ectocuneiform supported mainly by the 
astragalus; features not seen elsewhere by the writer. 
The feet of Coryphodon. 
The structure and position of the feet of Coryphodon, as represented 
in the restoration, require some consideration in this connection, 
in view of differing opinions on these points. The fore feet of 
Coryphodon were first figured and described by the writer, and 
figure 2 is the original cut then published. This figure was made 
from a well-preserved specimen in which both fore feet were 
present, and nearly in position when found. They were carefully 
kept in the matrix until prepared for the drawing, and hence the 
accuracy of the figure cannot well be questioned. The fore feet 
represented in the present restoration are constructed mainly from 
