DAKOTA AND NEBRASKA. 



189 



8. A fragment of the upper jaw of an adult individual, containing the last premo- 

 lar and the following pair of true molars of the left side. 



The measurements of the teeth are as follow : 



Lines. 



Antero-posterior diameter of crown of last upper premolar, . . 9 



Transverse " " an . . 10 



Antero-posterior diameter of first upper true molar, . . .10 



Transverse " " " ... 10 



Antero-posterior diameter of second upper true molar, . . .11 



Transverse " " " ... 11 



9. Three fragments of a lower jaw, consisting of the symphysial portion and por- 

 tions of the two sides. They contain the anterior pair of true molars and the last 

 premolar on both sides, the fangs of the third premolars, part of the alveoli of the 

 second and those of the first premolars, the fangs of the canines and those of the 

 incisors. The mental and the other basal protuberances are broken off. The first 

 true molar is considerably worn, and the summits of the teeth in front and behind 

 are slightly blunted. 



Measurements from the fragments and teeth are as follow : 



Depth of lower jaw below first true molar, 

 Width outside of canine alveoli, 

 Length of symphysis, 

 Antero-posterior diameter of last premolar. 

 Transverse " " 



Length of crown of last premolar, . 

 Antero-jjosterior diameter of first true molar 

 Transverse " " 



Antero-posterior diameter of second true molar. 

 Transverse " " " 



Breadth at base of third premolar, . 

 Breadth at base of crown of canine, 

 Width or transverse diameter of do.. 



Lines. 



24 

 33 

 40 

 14 



6^ 



9 

 11 



71 

 13 



9 

 15 

 IIJ 



9^ 



10. A number of small fragments of jaws, with and without teeth, from more than 

 half Or dozen different individuals of diflerent ages. A fragment of the lower jaw 

 retains one of the mental protuberances entire. Another retains the greater part of 

 the second basal protuberance, and a third, from a very young animal, retains it 

 entire. 



