392 



University of California Publications. 



Geology 



particularly below the molars, and is also thicker transversely 

 than in the living form of this region. The dimensions of the 

 teeth do not vary greatly from the living species except in the 

 thickness of both the upper and lower carnassials, which are 

 much heavier in the fossil form. M 1 tends also to be somewhat 

 heavier and broader on the median side than in the typical 

 C. ochropus, and in this respect more nearly approaches the 

 typical C. la Irons. In M, the metaconid seem to be slightly less 

 prominent medially than in the typical C. ochropus, possibly 

 owing to the greater thickness of the trigonid blade in the fossil 

 form. 



A skeleton of this species which has been assembled from 

 parts of separate individuals seems to show quite distinctly that 

 the animal was a rather slender, long-legged creature and evi- 

 dently swift footed as the living coyotes. 



Measure m e n t s . 



No. 10842 



Length from anterior side of premaxillaries to posterior side of 



occipital condyles 188.5 mm. 



Width across zygomatic arches 108 



Width between outer sides of tritocones of P 4 65 



Least width between superior borders of orbits 38 



Width between postorbital process of frontals 55 



Length, posterior side of superior canine to posterior side of M- 80.5 



Length, anterior side of P 4 to posterior side of M 2 37.3 



P : ', anteroposterior diameter 13.3 



P 4 , anteroposterior diameter 21.2 



P 4 , thickness across protocone 8.5 



M 1 , anteroposterior diameter measured along outer border 13.3 



M 1 , greatest transverse diameter : 16 



M 2 , anteroposterior diameter measured along outer border 7.3 



M-, greatest transverse diameter 10.5 



No. 11278 



Length, anterior end of left ramus of mandible to middle of pos- 

 terior side of cond.yles 145.5mm. 



Height of mandible below posterior side of P 5 1 7 



Height of mandible below posterior side of M. 1 22.5 



Thickness of mandible below protoconid of M x 11.8 



Length, posterior side inferior canine to posterior side M 2 85 



P 3 , anteroposterior diameter 11.7 



P 3 , greatest transverse diameter 4.8 



Mj, anteroposterior diameter 22.9 



M 1? greatest transverse diameter of trigonid portion 9.5 



M 2 , anteroposterior diameter 9.8 



