114 



ON THE EXTINCT MAMMALIA OF 



M. proprius. O. major. 

 Lines. Lines. 



Antero-posterior diameter of second upper molar, 

 Transverse " " " 



Antero-posterior diameter of first upper molar, 

 Transverse " " " 



Antero-posterior diameter of last upper premolar, 

 Transverse " " " 



Antero-posterior diameter of third upper premolar, 

 Transverse " " " 



Antero-posterior diameter of second upper premolar. 

 Transverse " " " 



Antero-posterior diameter of first upper premolar, 

 Transverse " " " 



Antero-posterior diameter of upper canine, 

 Transverse " " " 



Antero-posterior diameter of last lower molar. 

 Transverse " " " 



Antero-posterior diameter of second lower molar, 

 Transverse " " " 



Antero-posterior diameter of first lower molar. 

 Transverse " " " 



Antero-posterior diameter of last lower premolar, 

 Transverse " " " 



Antero-posterior diameter of second lower premolar. 

 Transverse " " " 



Antero-posterior diameter of first lower premolar, 

 Transverse " " " 



Antero-posterior diameter of lower canine, 

 Transverse " " " 



Antero-posterior diameter of lower lateral incisor. 

 Transverse " " " 



2. Small portions of the facial part of a skull, with teeth, from an individual of 

 rather more robust proportions and greater age than that of the preceding specimens. 

 They consist of small fragments of the maxillae with teeth, some isolated teeth, the 

 fragment of a malar, and one of a nasal bone. 



The last superior molar tooth in one of the specimens, represented in figure 5, 

 plate X, is remarkable for its proportionate narrowness and the greater size of its 

 posterior column or buttress, in comparison with those previously described. The 



