THE OSTEOLOGY OF ELOTHERIUM. 



277 



The lower milk-premolars are even simpler than the upper ; dp % and -g- are com- 

 pressed and conical, without accessory cusps, but with serrate edges and sharply-pointed 

 summit. Each of these teeth is supported upon two fangs. Dp ¥ is of the usual artio- 

 dactyl type, consisting of three transverse pairs of cusps, of which the median pair is the 

 largest, and the anterior pair the smallest. A small talon is formed by the elevation of 

 the cingulum in the median line, behind the posterior pair of cusps. 



This account of the milk dentition applies only to E. mortoni ; I have not seen these 

 teeth in the larger species. 



Measurements. 



No. 11156 



No. 10885 



Upper dentition, length 1 1 to M 3. . 



molar series, length 



premolar series, length 



canine, ant. -post, diameter. . 

 " transverse diameter. 



P 1, length 



P2, " 



P3, " 



P4, " 



M 1, length 



" width 



M2, length 



" width 



M 3, length 



" width 



Lower dentition, length I 1 to M 3. . 



molar series, length 



premolar series, length 



P 1, 



M 



M 



M 



length 



height of crown 

 length 



' height. 



3, length. 

 ' height. 



4, length . 

 ' height. 



1, length. 

 ' width. . 



2, length. 

 ' width. . 



3, length. 

 ' width. . 



.118 



.238* 



.048* 



.0385* 



.030* 



.038* 



.041* 



.035* 



.035 



.042 



.037 



.432* 



.121* 



.211* 



.028* 



.026* 



.031* 



.038* 



.046* 



.061* 



.046* 



.044* 



.037* 



.029* 



.0395* 



.036* 



.043* 



.037* 



.104 

 .175 

 .046 

 .042 

 .024 

 .038 



.031 

 .033 

 .036 

 .035 

 .039 

 .034 

 .033 



.108 

 .192 

 .026 



.033 



.043 



.037 



.031 

 .027 

 .035 

 .030 

 .039 

 .028 



? 0.270 

 .064 

 .124 

 .032 

 .022 

 .019 

 .025 

 .028 

 .0195 



.025 

 .0235 

 .021 

 .022 



.065 

 .113 



.023 



.028 



.018 



.020 



.019 



.023 



.024 



.021 



.0215 



.261 



.070 



.126 



.017 



.019 



.020 



.023 



.027 



.031 



.025 



.020 



.0215 



.013 



.0225 



.016 



.0245 



.016 



*No. 11161. 



