INDIAN TERTIAET & POST-TERTIARY VERTEBRATA. 
SIWALIK AND NARBADA BUNODONT SUINA. 
By R. LYDEKKER, B.A., F.G.S., F.Z.S. 
(AVITH PLATES VI. to XII.) 
INTRODUCTORY. 
In the fifth part of the preceding volume of the present work the remains of a 
large number of animals whose nearest existing allies are to he found in the pigs 
and hippopotami were described, and referred to a group termed the Suina 
Selenodontia. It was then shown that this group connects the living, or bunodont, 
Suina with the modern Ruminants ; and that such a complete transition is thus 
effected between the three groups that it is impossible to draw any real distinction 
between them ; although their retention for the purposes of classification is 
convenient. It is the group of Suina Bunodontia which forms the subject of the 
present memoir. 
The fossil Indian representatives of this group may be referred to the four 
following families ; viz., Rippopotamidce, Suidce, Entelodontidce, and Listriodontidce ; 
which will be treated of in this order. A large series of the remains of the two 
first families are figured in the “ Fauna Anti qua Sivalensis although in most cases 
they have never been described. These figures, although generally of a smaller size 
than is altogether desirable, are so good in execution as to render their reproduction 
in the present volume unnecessary. 
The comparatively simple structure of the molars of nearly all the members of 
the group indicates that these animals are more nearly related to the primitive 
ungulates than any other living artiodactyle group. The structure of their feet, and 
especially the form of the astragalus, indicates, however, that at all events the 
modern representatives of the group are very far removed from the primitive stock : 
and it is noteworthy that the hippopotamus, in which the dentition Is more specialized 
than in the pig, has retained more of the primal foot-structure than the latter. The 
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