DAKOTA AND NEBRASKA. 



93 



The following table of measurements 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, previou.sly indicated 

 under No. 16. 



Upper Teeth of Oeeodon Culbeetsoni. 



Length of series 



Length of series 



Length of series 



Antero-poslerior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



Antero-posterior 



Transverse 



of upper molars, 



of upper true molars, . 



of upper premolars, . 



diameter cf last true molar, 

 it ti it 



diameter of second true molar, 

 ti li it 



diameter of first true molar, 

 (( ii tt 



diameter of fourth premolar, 



(( ic a 



diameter of third premolar, 



it a (c 



diameter of second premolar, 



t( a (( 



diameter of first premolar, 



U It tc 



diameter of upper canine. 



Measurements in lines. 



No. 11 No. 10 No. 13 



4.3 i 

 23 J 

 20 J 

 10 

 10^ 

 9i 

 10 

 7 



8J- 

 41 

 7 



51 

 5i 

 51 

 41 

 Ai 

 Si 

 4J 

 5 



41 



21 J 

 19J 

 8.V 

 91 

 8J 

 9 

 6i 

 7J 

 4J 

 6i 

 5i 

 51 

 51 

 5 

 5 

 31 

 4 

 4J 



39 



201 



20 

 8* 

 8* 

 li 



8i 



6 



7 



4i 



61 



5k 



5k 



5k 



4 



31 



31 



19 



71 



8} 



71 



8^ 



6 



7* 



4* 



61 



51 



4i 



No. 16 



35 



m 



17J 

 7 



71 

 6J 

 71 

 5 J 

 6 



41 

 6 

 5 

 4* 

 4i 

 Si 

 3J 



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

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



Lower Teeth of Oeeodon Culbeet- 

 soxr. 



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 " " " 









Mea 



suremenU h 



lines 









1 



2 



3 



4 



5 



6 



7 



8 



9 



10 



40 

















36 





25 



22 















21 





15 







15^ 



14? 



15 







15 



16 



Hi 



91 











lOi 



121 



lU 





61 



5J 











5J 



7 



5J 





71 



6J 



6i 









7 



7* 



71 



7 



61 



5J 



51 









5J 



63 



5* 



51 



6 



5J 



51 





51 



6 







5J 



6 



5i 



5 



^ 





4J 



5 







5 



5 



6 



5 



5 



6J 



5d 



5} 







5i 



6 



5 



4J 



4} 



ii 



4* 



4-] 







4J 



U 



5^ 





4i 



5i 



5 



5i 







5i 



5i 



4 





31 



3i 



31 



3* 







3J 



Si 









4? 



4i 



4J 







4i 



5 









2* 



2i 



5 



3 



21 







2J 



2i 



5 



3 



