ORDINAL TYPES OF MOLARS: CARNIV01IA 



141 



pa. 



m.l 



m.2 



FIG. 90. Crown view of the worn upper cheek teeth of a gigantic Amphlcyonine Canid 

 Borophagus (ii'H HI, from the Upper Miocene of Texas, showing tritubercular molars (ml, m%), and 

 carnassial p4. the enlargement of the paraoonc (/>'(.) is apparently secondary, xj. After 



Matthew. 



Fie;. 100. Skull aud jaw of Mi'it'ln oinni'm, an extinct species of marten (family Mustelidw), 

 from the Upper Miocene of Colorado. -Note especially the carnassial teeth, which as in the 

 Felidas have been developed in the fourth upper premolar, and first lower molar. Note also the 

 reduction of the first upper molar and the absence of the other post-carnassial teeth, another 

 analogy with the Felidse. x 1. After Matthew. 



p.3 

 \~-V-* 



.f 



FIG. 101. Inferior view of the skull of Buncelwwt l<i!i<>/>li"t/i'i<, a primitive Musteline, from the 

 Oligocene of Colorado. Note especially the carnassial modification of p\ the reduction of );ii, the 

 practical disappearance of m~. x|. After Matthew (1902). 



