218 M. R. Thorpe — New Species of 



the presence or absence of a second root in the second 

 premolar. In both of these specimens, the superior 

 second premolar is on the point of disappearance. The 

 superior molars of both are three-rooted. The superior 

 carnassial in specimen No. 10949 has a distinct, though 

 small, anterior cusp, developed from the cingulum, in 

 which it is prophetic of Machcerodus. 



Measurements. 



Holotype Paratope 



(10050) (10949) 



mm. mm. 



Prosthion to basion 154 



Prosthion to nasion 78.5 



Basion to nasion 99 



Prosthion to bregma , 126.5 



Basion to bregma 71 



Bizygomatic diameter 116 



Diameter of postorbital constriction . . 31 



Bimastoid diameter, max 70.5 



Palatal length 79 



Posterior palatal breadth 47 



Inferior orbital margin to alveolar margin 



(min. ) '. . 24 



Infraorbital foramen to posterior margin of 



zygomatic process of maxilla 28 28 



Depth of mandibular symphysis (est.) 40 



Depth of mandible posterior to P 4 21.5 



Depth of mandibular flange 49 



Length of tooth row, C to M 1 , inclusive 67.5 



Length of tooth row, P 3 to M 1 , inclusive 36 37 



Diastema, C to P 3 16 



Diastema, I 3 to C 3 



Superior canine, maximum diameter at al- 

 veolus 17.5 



Superior canine, transverse diameter at al- 

 veolus 10 



Crown of P 3 , length of base 11 11 



Crown of P 3 , maximum width 5 5 



Crown of P 4 , length of base 21 21.5 



Crown of P 4 , maximum width 10 11 



Length of tooth row, P 2 to M 3 , inc 39 



Diastema, inferior canine to P 3 25.5 



Crown of P 4 , length of base 14 



Crown of P 4 , maximum width , 6.5 



Crown of M 1? length of base 17 



Crown of M 1; maximum width 8.5 



Inferior * canine, maximum diameter at al- 

 veolus 7 



Inferior canine, transverse diameter at al- 

 veolus 5 



