LEPUS 501 



than external border ; posterior face with longitudinal concavity 

 barely indicated ; root as short as in Oryctolagus, bvit whole 

 course of tooth noticeably indicated on outer surface of bone. 

 Anterior upper premolar with lateral re-entrant angles on 

 anterior margin variable in development, one or both occasionally 

 obsolete. Other maxillary teeth as in Oryctolagus, but posterior 

 border of re-entrant fold sometimes crenulate ; roots of maxillary 



Fig. 102b. 

 Lepus eitropcewt. Xat. size. 



teeth not extending so far into orbit as in Oryctolagus and in 

 Lepus timldiis, the distance from crown of third premolar to 

 upper surface of its root capsule usually less than alveolar length 

 of tooth-row. Anterior lobe of anterior lower premolar usually 

 narrower than in Oryctolagus, but broader than in Lepus timidus ; 

 posterior section of this tooth as well as that of the succeeding 

 molariform teeth (including «<,) relatively larger than in 

 Oryctolagus. 



