252 
EXTINCT MONSTERS 
The artist and author, however, in making the accompanying | 
restoration, have been guided by the evident relationship between ' 
Coryphodon and the Tinoceras. “ The movements of the Corypho- 
dons,” says Professor Cope, “doubtless resembled those of the 
elephant in its shuffling and ambling gait, and may have been j 
even more awkward from the inflexibility of the ankle. But in j 
compensation for the probable lack of speed, these animals were 
most formidably armed with tusks. These v/eapons, particularly 
those of the upper jaw, were more robust than those of the 
carnivora, and generally more elongate.” There is no evidence 
that they had a proboscis — in fact, it is practically impossible. 
We may suppose from the nature of the teeth, and from other 
evidence, that they were vegetable feeders, but not restricted 
to any particular class of food; to a large extent they were 
omnivorous, like the hogs of to-day. 
It is a little difflcult to follow the curious interpretation arrived 
at by Professor Osborn and Dr. Wortman that “ the positions of 
the fore and hind feet were absolutely different,” the former being 
like those of the elephant (where only the tips of the toes touch 
the ground); the latter, in their opinion, like those of a bear 
and spreading out to rest on the ground (plantigrade).^ This 
is not borne out by Professor Marsh’s figure. Much valuable 
material for the study of the anatomy of this primitive mammal 
was collected by these two gentlemen, in spite of the many 
difficulties with which they had to contend, during their expedi- 
tion, in the summer of 1891, into the Big Horn and Wind Eiver 
regions, where the Wasatch strata are found. 
The sketch-map shown in Fig. 93 will give the reader 
a general idea of the positions of the different geological 
^ Bulletin of the American Museum of Natural History, vol. iv. (1892), 
p. 121. 
