i!V ir. II. SCOTT AND ci-ivi-: K. i.oun, r.L.s. 5 



We are thus quite sure as to th<j kind of tuslc that should 

 be associated with skulls of Nototherium victoria;, also the 

 tusks of the male of Nototherium viitchelli are available for 

 study, and, as already stated in our note upon the supposed 

 female animal of that species, we have an upper tusk that 

 in a general way conforms to the characters of the male of 

 that species, but is upon the whole rather flatter. Mr. Har- 

 risson's material also supplies us with a tusk that might very 

 well represent the lower tooth of the female of N. mitchelli, 

 whose remains we have just passed in review, since its ground 

 point exactly fits the tusk relegated to that animal — also 

 the second worn surface agrees very closely with the kind of 

 wear associated with the second incisor of the upper jaw. 

 If this relegation is a correct one, and we provisionally so 

 place it, then the lower tusks of females of N. mitchelli depart 

 somewhat from those of the males, and hold a middle place 

 between the male tusks and those of Nototheriuvi victoriee. 

 This is not a point to be pushed to an extreme limit, but is a 

 side note that awaits future canfirmation or otherwise. We 

 have spent a lot of time over the classification of this tusk, 

 and have been always driven back to the conclusion named, 

 and therefore leave the matter at this stage with the hope 

 ' of obtaining in the future further material for study. 



