BY H. II. SCOTT AND CLIVB E. LORD. 79 



such an action, heno th< hinging of the cartilage itself. 

 We do not imagine that any great .if motion was 



thus obtainable in actual practice, but enough to give 

 mobility to the upward pull of the 



In animals of the long faced type (to be denned fully later 

 on), the nasals bent downwards, the horn was weak, and 

 for practical purpos b, bul slightly dev loped, and so im- 

 planted as to leave the nasal caj from the 

 stiffening effects of its contact with the nasal platform, and 

 the origin of the lip. and accordingly th studs lost most of 

 then motion, and may. in individual cases, have aid-:; 

 up to the walls of their respectivi of which we 

 are not without actual proof. The only other instance 

 that w can recall in which the nasal cartilage was 

 sibly att chi I bo the bones by a bony stud Ls that of the 

 South American Mylodon. In that extinct pleistocene 

 giant, the terminal s ction of the united nasal bones de- 

 ingle, central, circular which, by ana 



Ldition similar to that found in Nototherium. 



If the stud existed in Mylodon — and apparently it has 



been found, as is not to h.^ wondered at if it was 



as loose as tin studs are in the Nototheria — it was single 



and central, and not doujble and lateral. En Ov 



ii upon thi Mylodon, the fossa noted is beautiful- 

 ly shown ipp .nam- being exactly similar to that 

 obtaining in Nototherian sku n the studs have 

 dropped out. Now a fossil Nototherian skull, having once 

 its nasal studs would, with every mutilating move- 

 ment, Buffer attrition of the walls of th until the 

 thi t i i v of the nasal hem s would be I ff< c 

 tiv.lv masked. Taxonomist 1 note this point ! [1 

 is known that, irrespective of accidental rending of the 

 horn from its platform, in modern rhinoceroses the horn 



impletely shed, and renewed every six years, 

 wh n . animals frequently forge! it- loss and butt 



their tender n; ons in ait mpting to horn a foe. If 



the born was similarly deciduous in tin Nototheria, they 

 ill have their tusks available during the period 

 of their renewal, and the extra mobility of the lips would 

 a special purpose here. Our animal was just reach- 

 ing the adult of evideno can prove), and 

 in the full power of i gth it had engaged in a 

 rate hat 1 1 v.r h som i n. broke the 

 bone in half, shattered one mandibular tusk, and 

 otherwise sustained minor wounds, that eventually led to 

 ath. apparently st me weeks lat r. The period that 

 n the great fight and the time it actually 



(4) Pi. 5, fig. 3a. 



