150 EXTINCT MONSTERS. © 
There may be differences of opinion among paleontologists 
as to the appearance presented by this formidable creature when 
alive, and no doubt the nature of the skin must always be more 
or less a matter of conjecture in such cases, but we venture to 
hope that the restoration here given, based as it is upon Mr. 
Smit’s thorough acquaintance with lving animals and Professor 
Marsh’s description, will meet with a favourable verdict. 
Looking at the skeleton, one is struck with a certain resem- 
blance to the rhinoceros on one hand, and to the elephant on the 
other. ‘The legs are very elephantine, and the feet must have 
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Fic. 42.—Skeleton of Zinoceras ingens. (After Marsh.) 
been covered with thick pads, but the body reminds one more of 
the rhinoceros ; and yet, again, there is some suggestion of the 
hippopotamus. The eye was small and deep set, as in the 
rhinoceros. In the upper jaw the two canine teeth are developed 
into dagger-shaped tusks, the use of which can only be con- 
jectured. In the females these are but slightly developed. 
It is quite clear, then, that we cannot place the Dinoceras 
in any order of living mammals. It is what paleontologists call 
a “generalised type ;” that is to say, it presents certain characters 
seen in several groups of living quadrupeds, and not any of those 
