326 



University of California Publications in Geology [Vol. 8 

 Measurements of Skull 



S rH - c « rtJ= fe rH '° ,2 P.C-S; u ft-^Ko" hp- « 



■oa . o cs ■ o a 6n 6 ■ -So 



gtspi Ph 55<! § £g gjgo 



Cranium — 



Length of skull from anterior 

 margin of maxillaries to pos- 

 terior end of occipital con- 

 dyles 513 mm. 498 512 470 502 540 



Length of palate from anterior 

 end of maxillaries to post- 

 palatine notch 237 222 218 212 230 250 



Greatest width of maxillaries, 

 measured across palate anter- 

 ior to first teeth 156 135.4 138.8 127 127 



Least width of palate posterior 



to fifth tooth 72.2 69.9 61.4 64 76 69 



Least distance across ventral 



margin of pterygoid plates .... 124.4 113.9 118 126( ?) 97(?) 89(?) 



Greatest width of muzzle 157 137 134 128 156 150ap 



Least width behind postorbital 



processes 134 113.7 106.6 89 57 125op 



Mastoid width above stylohyal 



processes 210 196 193 160 



Greatest width across occipital 



condyles 143.3 120 143.9 128 120 138ap 



Height of skull, measured from 

 plane of basi-occipital to dor- 

 sal plane 157 135 151 121 142ap 125op 



Least distance from fifth super- 

 ior tooth to middle of post- 

 palatine notch 55.8 54.3 46.5 29.5 39 60(?) 



Mandible — 



Length from anterior end of 

 symphysis to posterior end 



of condyle 386 386 385 371.3 378 + 



Greatest length of symphysis .... 115.6 116.4 109.5 120 120ap 



Greatest predental width 109.5ap 95.9ap 102.7 96ap 



Depth of ramus between third 



and fourth inferior teeth, 



measured normal to inferior 



margin 92 83 94.7 85 100 



*Cockerell, T. D. A., A Fossil Ground-Sloth in Colorado, Univ. Colo. Studies, 

 vol. 6, pp. 309-312, 2 pis., 1909. 

 ap, approximate. 



