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MANUAL OF ZOOLOGY. 



The last of the Probosddea is a remarkable extinct animal, 

 the Deinotherium . This extraordinary animal has hitherto 

 only been found in Miocene deposits, and little is known of 

 it except its enormous skull. Molars and prsemolars were 



Fig. 420. A, Skull of Mastodon giganteum ; B, Side-view of the second true molar 

 of Mastodon giganteum. (After Owen.) 



present in each jaw, and the upper jaw was destitute of can- 

 ines and incisors. In the lower jaw were two very large tusk- 

 like incisors, which were not directed forwards as in the true 



Fig. 421. Skull of Deinotherium 

 giganteum. Miocene Tertiary. 



Fig. 422. A, Side-view of the third 

 molar of Deinotherium giganteum; 

 B, Grinding surfaca of the same. 

 Miocene Tertiary. (After Kaup.) 



Elephants, but were bent abruptly downwards (fig. 421). The 

 animal must have attained an enormous size, and it is probable 



