62 



ON THE EXTINCT MAMMALIA OF 



Width of glenoid cavity, .... 



Antero-posterior measurement of do., 



Breadth of face outside of tubercular molars, 



Distance from latter position to back angle of forehead, 



Length of face from sagittal crest, 



Length of forehead as formed by the frontals, 



Breadth between ends of post-orbital processes, 



Breadth of skull at zygomata, estimated, . 



Breadth of face below post-orbital processes of malars, 



Breadth at prominences of anterior orbital margin, 



Breadth in front of infra-orbital foramina, 



Breadth at canine alveoli, where most prominent, 



Length of face from anterior orbital margin to incisive alveol 



Length of nasals, ..... 



Breadth of nasals together, between angular processes of frontals 



Breadth of nasals together, at anterior extremity, 



Height of nasal orifice, obliquely, . 



Breadth " " . ... 



Height of orbital entrance, 



Breadth " " . 



Length of upper molar series without first premolar. 



Length of upper canines from the alveoli, estimated, 



Breadth of upper canines at base of crown, 



Width of space occupied by upper incisors, 



Length of crown of lateral incisor, 



Length of crown of second incisor, 



Length of lower jaw at base from angle to symphysis. 



Depth of lower jaw at condyle, . 



" " at coronoid process, . 



" " below second premolar, 



" " at side of chin, 



" " at symphysis, 



Length of coronoid process above condyle, 

 Hiatus between lower canine and molars. 

 Space between canines occupied by lower incisors, 



Measurements derived from slightly worn molar teeth, represented in figures 2, 3, 

 4, plate IV, belonging to an animal which had just reached the adult condition, are 

 as follows: 



