444 



CABNIVORA 



abruptly upward. Auditory bulla with anterior annular portion 

 small and flattened, the small meatus with short but evident 

 tube marked off from ring by a constriction ; posterior inflated 

 part of bulla large, higher than wide, extending noticeably below 

 level of palate, and projecting laterally beyond mastoid level ; 

 greatest transverse diameter of inflated portion about equal to 

 least breadth of basioccipital. Paroccipital process long, narrow 

 and scale-like, closely flattened against posterior surface of bulla, 

 less than half of which it covers. Lambdoid and sagittal crests 

 well developed, the latter extending across entire brain-case to 

 postorbital region. Mandible robust, the lower border bent 

 abruptly upward at level of m 3 ; coronoid process short and 

 broad, its width at level of condyle much greater than height 

 above condyle. 



Teeth. — The teeth are robust and strong but not remarkably 

 large. Incisors and canines with no special peculiarities, the 



cutting edge of upper incisors entire, 

 that of lower incisors obscurely bi- 

 lobed, the outer lobe largest. Ante- 

 rior premolar both above and below 

 simple, smaller than corresponding 

 outer incisor. Second and third 

 premolars triangular when viewed 

 from side, the two upper teeth with- 

 out true secondary cusps, but pm 3 

 sometimes with a slightly developed 

 posterior basal tubercle; inner me- 

 dian projection well developed and 

 bearing a small cusp in pm 3 , slightly 

 indicated in pm? ; the two lower teeth 

 with longer base and less robust 

 main cusp, pm 3 with slightly de- 

 veloped anterior basal cusp and a 

 small but distinct median cusp on 

 Fourth lower premolar like second 

 and third but larger, the crown wider behind and the cusp 

 on posterior cutting edge large and well developed. Upper 

 carnassial with large antero-internal lobe somewhat exceeding 

 posterior heel in area, its cusp robust ; antero-external corner 

 with large, occasionally almost cusp-like cingulum ; anterior 

 border of tooth slightly concave. Lower carnassial with the 

 three anterior cusps large, the outer exceeding the two inner, 

 which are of approximately equal height, the posterior heel low, 

 its area barely half that of anterior portion of tooth and about 

 equal to that of second molar, its postero-external border elevated 

 and trenchant. First upper molar with crown nearly twice as 

 wide as long, its anterior border convex, its outer and posterior 

 borders concave; protocone large, occupying entire inner border 

 of crown ; paracone and metacone small, sub-equal, the latter 



Fia. 03. 



Mmigos widdringtonii. 

 Teeth. Nat. size. 



posterior cutting edge. 



