256 



SUBUNGULATA 



ORDER IX 



transverse ridge, the lower premolars similar to the molars, and having two almost 

 straight transverse ridges. M.^ with a third ridge. Loiver molars with four roots. 

 The ridges of the upper molars are slighthj concave posteriorly. Lower jaw 

 massive, with a broad ascending branch. 



Barytherium Andrews. The systematic position of this imperfectly- 

 known genus is rather uncertain. In its dentition and form of the lower 

 jaw, which is massive with a broad ascending branch and also in the massive 

 form of body, one is reminded of Dinotherium. The distally expanded 

 humerus has an unusually well-developed deltoid crest, and the stout radius 

 articulates to an equal extent with the lunar and scaphoid. Upper Eocene of 

 Egypt. B. grave Andrews. 



0.0.2.3. 



1.0.2.3 



backwardlij directed tusks. 



Family 3. Dinotheriidae. 



Symphysis of the lower jaw downwardly cxirved, tvith a pair of 

 First m.olars in both jaivs with three, the remaining 



Dinotherium giganteum Kaup. Lower Pliocene, Eppelsheini, Hesse-Darmstadt. Skull and lower jaw, i/i.5- 



(After Kaup.) 



molars with two simple slender ridges, separated by broad valleys. Without cement. 

 All teeth in a, single plane. Dental succession normal. 



Dinotherium Kaup (Figs. 338, 339). Skull moderately high, occiput 

 sloping backwards, with long premaxillaries and broad frontal. Symphysis of 



