Bulletin American Museum of Natural History. [Vol. X, 



and tarsus rested directly on the gronnd together with the entire 

 plantar surface of the foot. This substantial difference between 

 the advanced state of evolution of the fore foot and retarded 

 evolution of the hind foot, is of great interest. It is clearly 

 shown in the accompanying figures." 



Fig. I. COT-jz/Arx/rtw //rtw«/«.9, as restored by Marsh. t8^^ One-twentieth natur.il size. 



In 1893, Marsh/ in his description and restoration, presented 

 quite a different conception of the animal as u/i^iilii^rade. In 

 regard to these matters he makes the following statement : 



" This restoration is given one-twelfth natural size. The posi- 

 tion 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 indi- 

 vidual, and 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. This was supplemented by other remains, which 

 appeared to be superficially 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 speci- 

 mens from nearly allied forms were used, but no serious error 

 can thus result .... The tore feet presented in the j^resent 

 restoration are constructed mainly from the same specimen (that 

 first figured and described by the writer), and the position given 

 in the original figure has been essentially retained .... The posi- 

 tion 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. In Dinoccias the terminal 



1 ' Restoration of Coryphodon,' Amer. Journ. Science, Oct., 1893, p. 324. 



