240 
NOTOTHERIUM MITCHELLI1. 
position of the last molar tooth, which is in advance of the 
origin or base of the coronoid process, instead of being inter¬ 
nal to, and hidden by that part when the jaw is viewed from 
the outer side. These and some other differences observable 
in an imperfect posterior half of the left ramus of a lower jaw. 
found in the bed of the Condamine River, Professor Owen 
regards as indicating a second speeies of Nototherium , which 
the Professor has named in honour of Sir Thomas Mitchell, 
who has exerted himself so much in procuring materials for 
the elucidation of the organic remains of that interesting 
continent, Australia. 
