4O2 PATAGONIAN EXPEDITIONS! PALAEONTOLOGY. 



No. No. No. No. 9254. 



15,14.8. 15,029. 15,154.. Am. Mus. 



Mandible, transverse diameter of con- 



dyle ...... .012 



Mandible, depth of horizontal ramus 

 at M ? ...... .0125 .013 



Mandible, depth of horizontal ramus 



at posterior premolar ... .010 



Mandible, depth of horizontal ramus 



at anterior premolar . . . -95 



Upper dentition, length, median in- 

 cisor to M .... -0585 .055 -0565 



Upper dentition, length of space occu- 

 pied by premolars . . . .018 .017 -I75 



Upper dentition, length of space occu- 

 pied by molars .... .0245 .023 .020 .021 



Lower dentition, length, anterior 



border of canine to M ? . . .0525 



Lower dentition, length of space occu- 

 pied by premolars ... .018 



Lower dentition, length of space occu- 

 pied by molars .... .026 



Median upper incisor, width of crown .001 



Lateral " " " " " .002 .002 



Upper canine, antero-posterior diam- 

 eter at alveolar border . . . .0058 .006 .0065 



Upper canine, transverse diameter at 



alveolar border .... .004 .0042 .004 



Anterior superior premolar, antero- 

 posterior diameter . . . .004 .004 .0038 .004 



Anterior superior premolar, trans- 

 verse diameter .... .0015 .0015 .0015 .0015 



Median superior premolar, antero- 

 posterior diameter . . . -0055 .005 .005 



Median superior premolar, transverse 



diameter .002 .0018 .0018 



Posterior superior premolar, antero- 

 posterior diameter . . . .0063 .006 .005 .0056 



Posterior superior premolar, trans- 

 verse diameter .... .003 .003 .0028 .0028 



Mi, antero-posterior diameter . . .007 .007 .006 .007 



" transverse diameter . . . .004 .004 .004 .004 



M, antero-posterior diameter . . .0077 -0074 .006 .007 



" transverse diameter . . . .006 -0055 .005 -0055 



, antero-posterior diameter . . .007 .007 .006 .0064 



transverse diameter . . . .0078 .0068 -0055 .0058 



