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PALAEONTOLOGY 



Genus Dinotherium, Cuv. and Kp. — This name was given 

 by Kaup, after the discovery of the singular shape and arma- 

 ture of the lower jaw, to the huge bilophodont Mammal, first 

 made known by Cuvier under the name of " Tapir gigantesque." 

 The length of the skull, from/ to d, in fig. 110, is 3 feet 8 inches. 



Fig. no. 

 Skull of Dinotherium giganteum (Miocene, Eppelsheim). 



The teeth in this skull, in addition to the two large deflected 



tusks of the lower jaw, are five in number on each side of 



both jaws. A study of the changes of dentition in fossils of 



young Dinotheria show that the first two teeth answer to 



the third and fourth premolars, as signified by the symbols 



p, 3 and 4 ; and that the rest are true molars (m, i, %, 3). Of 



these, the first tooth (p, 3), is rather trenchant than triturant ; 



the third tooth ( 1 ) lias three transverse ridges. The other 



grinders have two transverse ridges. This " bilophodont " 



