996 THE WHITE EIVER FAUNA. 



equal to that of Pogonodon platycopis or JDinidis cyclops. It has but two 

 roots, and its crown is partly concealed from the side view by the posterior 

 extremity of the sectorial. 



The mandibular incisors are well developed, and the canine is not much 

 larger than the external incisor. Of the molars, the first is very small, 

 though two-rooted, and has anterior and posterior basal lobes, although the 

 former is minute. The fourth preraojar is intermediate in size between the 

 third and the sectorial, and has anterior and posterior basal lobes, the 

 posterior being the longer. The main cusp is not high, and its acute edges 

 are crenulate. The sectorial has its principal cusp elevated ; the heel is 

 short, and the internal tubercle stands on the posterior edge of the main 

 cusp two-fifths the distance from the base of the crown. The enamel of the 

 external sides of the last two molars is slightly wrinkled. 



Measurements. 



M. 



Axial Ifugth from premaxillary edge to orbit 041 



Axial length from premaxillary edge to extremity of maxillary bone 061 



Axial length to middle of posterior border of palate 060 



Width of palate behind sectorials 054 



Length from premaxillary border to frontoparietal suture on profile 095 



Width of occiput at superior part 030 



Length of base of third premolar 009 



Length of base of sectorial 020 



Width of base of tubercular molar Oil 



Length of mandible to augle 101 



Length of dental series from I. i 067 



Length of canine and incisor series (oblique) -^IS 



Length of diastema 019 



Length of base of Pm. iii 006 



Length of base of Pm. iv 012 



Length of base of sectorial - 018 



Depth of chin at symphysis 031 



Depth of chin at flauge - 032 



Depth of ramus at M. i 017 



The mandibular ramus of the young animal already mentioned sup- 

 ports the temporary sectorial, and displays two of the permanent incisors 

 inclosed in the jaw in an unworn condition (Plate LXVIIa, fig. 17). The 

 latter have slightly recurved conic crowns, with denticulate cutting edges. 

 The sectorial has the character of that of most Felidce; there is a short 

 acute heel, and an elevated compressed internal tubercle, which is as high 

 as the anterior lobe of the crown. Its position is behind and a little within 

 the median cusp of the tooth. 



