310 



ON THE EXTINCT MAMMALIA OF 



Height of do. at back of last molar, 

 Height of do. at first small premolar, 

 Breadth of alveolar portion of symphysis, 

 Breadth of symphysis where narrowest. 

 Length of symphysis. 

 Length of series of seven upper molars. 

 Hiatus between do. and the canine, 

 Length of series of seven lower molars, 

 Hiatus between do. and the canine. 



Measurements of molar teeth derived from several of the more perfectly preserved 



series are as follow : 



Adult. Adult. Aged. Milk. Milk. Adult. 



Length of upper series of seven molars, . 

 Length of upper series of six large molars. 

 Length of upper series of three back molars, 

 Length of lower series of seven molars, 

 Length of lower series of six large molars. 

 Length of lower series of three back molars, 

 Ant.-post. diameter upper small premolar, 

 Transverse " " " 



Ant.-post. diameter lower small premolar, 

 Ant.-post. diameter upper first large molar. 

 Transverse " " " 



Ant.-post. diameter upper second large molar, 

 Transverse " " " 



Ant.-post. diameter upper third large molar, 

 Transverse " " " 



Ant.-post. diameter upper last molar. 

 Transverse " " " 



Ant.-post. diameter lower first large molar, 

 Transverse " " " 



Ant.-post. diameter lower third large molar. 

 Transverse " " " 



Ant.-post. diameter lower last large molar. 

 Transverse " " " 



