624 



ME. C, FORSTER COOPER ON JIIOCENE 



but which, as has just been stated above, occurs also in 

 D. giganteum. The remaining teeth in tlie collection are not 

 distinguishable from the smaller forms from Europe, and call 

 for no comment except for three specimens. Of these, one appears 

 to be an anterior lower milk molar (PI. IV. fig. 4 and text-fig. 11 ), 

 a tooth which apparently has not so far been noticed. It is 

 24 mm. long and 21 wide, and consists of two ridges, one running 

 from the middle of the inside border round the front and along 



Text-fisfure 11. 



Dinotherium sp. Anterior lower milk molar, internal view from side. X 1. 



the whole outside border, but being interrupted by a small notch 

 towards the front of the outer border; the second ridge runs 

 transversely across the hinder part of the tooth from a high cusp 

 on the inner side towards the outer border. The tooth is pointed 

 in front, wide behind, and triangular in ground-plan. Posteriorly 

 there is a small cingulum shelf and anteriorly a small cingulum 

 cusp. 



Text-figure 12. 



Sp. incertcB sedis. Side \iew of tootli, the anterior end pointing- to the ri<'-]it. X 1. 



The next tooth (PI. IV. fig. 5) is apparently a third upper 

 premolar, but of unusual form. It is partially worn, and shows on 

 one side two low cusps not touched by wear ; opposite these 

 are two large irregular areas of wear. There is no cingulum 

 around these cusps, but a small one at each "end" of the tooth. 

 In the plate the two low cusps are placed in the same position as 

 the ectoloph of the more noi-mal premolar (broken in this speci- 



