DAKOTA AND NEBRASKA. 



93 



The following tuljlc of ineasureraouts of the upper molar series, in five specimens, 

 exhibits a considerable range of variation. The first specimen is a robust skull, sup- 

 posed to be that of a male, above indicated under No. 11. The second specimen, 

 likewise a robust skull, probably of a male, was indicated under No. 10. The third 

 specimen consists of a portion of a medium-sized skull, indicated under No. 13. The 

 fourth specimen consists of a fragment from a medium-sized skull. The fifth speci- 

 men also consists of a fragment from a medium-sized skull, previously indicated 

 under No. 16. 



The following measurements are taken from fragments of lower jaws with teeth, 

 which, while exhibitmg their size, at the same time exhibit a range of variation : 



Lower Teeth of Oeeodon Culbert- 

 soni. 



Inferior molar series. 

 Inferior true molar series, 

 Inferior premolar series, . 

 Ant.-posterior diameter last molar,- 

 Transverse " " 



Ant.-posterior diameter second molar. 

 Transverse " " " 



Ant.-posterior diameter first molar. 

 Transverse " " " 



Ant.-posterior diameter last premolar, 

 Transverse " " " 



Ant.-posterior diam. second " 

 Transverse " " " 



Ant.-posterior diam. first " 



Transverse 



Ant.-posterior diameter crown of canine, 

 Transverse 



