BIG BADLANDS OF SOUTH DAKOTA. 489 



Measurements. 



Type, No. 10008 'No. 1156. 



Y. P. M . Princeton 



Skull length, condyles to incisor border 760 mm. (estimated) . . 770 mm. 



Width across muzzle at alveolus of p2 96 100 



Length of malar process below orbit 339-5 



Width of process at narrowest point, distal 



to greatest expansion 102 



Greatest width of process 146 



Length of anterior process of temporal from 



glenoid cavity 135 



Length of symphysis 150+ 



Depth of rami at p2 86 



Depth of rami at m2 102 



Upper premolar length 186 194 



Upper molar length 112 112 



Lower premolar length 218 



Lower molar length 124 



Diameter, pj, anteroposterior .' 39 



Diameter, p4, anteroposterior 31 28.5 



Diameter, p4, transverse 34 34.5 



Diameter, mj, anteroposterior 33 



Diameter, mj, transverse 44 



Diameter, m2, anteroposterior 40 42 



Diameter, m2, transverse anteriorly 42.5 47 



Diameter, m3, anteroposterior 36 



Diameter, m3, transverse at widest part 41 



Diameter, p2, anteroposterior 47 



Diameter, p3, anteroposterior 52.5 



Diameter, p4, anteroposterior 41 



Diameter, p4, transverse 24 



Diameter, m7, anteroposterior 36 



Diameter, mi, transverse 27 



Diameter, m2, anteroposterior 41.5 



Diameter, m2, transverse 34 



Diameter, mj, anteroposterior 42 



The lower jaw lacks condyle and angle, which have been recon- 

 structed in plaster, and the latter may be too small. While the first 

 lower premolar is single-rooted and close to the canine as in Pelonax, 

 the second premolar is a large double-rooted tooth, supported on 

 stout high roots and almost as long anteroposteriorly, when meas- 

 ured on the alveolar border, as p3 (p2, 47 mm.; p3, 52.5 mm.). 

 Furthermore, it is widely spaced front and rear {2y mm. in front, 

 21.5 behind), quite unlike Pelonax. Size further distinguishes this 



