391 



in every direction ; and their base is without any collar-like projection. 

 These remarks are chiefly applicable to the three last grinders : the others 

 are different in every respect. 



The last of these, that which precedes the antepenultimate, has three 

 slight convexities on its external face, and three points on its crown, 

 which render the coronal line undulating. From this line, near its mid- 

 dle, a branch is given, which passes towards the internal face and there 

 bifurcates. The next two have also three convexities and three points, 

 but their crowns have not the branching line; or if a little of it exists in the 

 second of these teeth, it does not bifurcate. Before these stands the one 

 which answers to the first of the palaotherium. It is equally simple with 

 that, and is compressed, and generally pointed. 



In this part, in the pttt&atherium, commences the vacant space, at the 

 end of which is placed the canine tooth. Neither of these existed in 

 this animal; but, immediately before the small molar tooth Inst described 

 there are three incisors, nearly similar to the preceding tooth, but which 

 become more and more pointed. Hence there appears to have been, in 

 the lower jaw of this animal, fourteen grinding and six incisive teeth, 

 without any canine tooth or intervening space. 



For the purpose of showing the difference of form between the two 

 kinds of grinders in this animal, one of each is here figured Plate XXI. 

 Fig. 8, being the antepenultimate ; and Fig. 9, the one before the 

 antepenultimate ; or, in other words, Fig. 8 is the first of the last three 

 grinders; and Fig. 9, being the next to it, is the last of the other 

 series. 



The propriety or necessity, indeed, of regarding this animal, as distinct 

 from any known genus, will appear from these considerations. Among 

 the pachydermata, the rhinoceros and daman alone are without' canine 

 teeth ; but they have but four inferior incisors, or they even want them 

 entirely ; and when they do possess them, there always is an interval 

 between the last incisive and the first ^grinder. 



