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University of California Publications. [Geology 



tooth as in C. indianensis. M 2 is rather narrow anteroposte- 

 riorly ; the metacone is small and the hypocone seems also to be 

 relatively small. 



In a fragment of a lower jaw accompanying specimen 11283 

 the carnassial possesses an exceedingly weak metaconid, while 

 the entoconid is slightly larger than in the average specimen of 

 C. indianensis. The metaconid is even weaker than in C. india- 

 nensis and approaches the relative size seen in a specimen of 

 C. pambasileus available. On M 2 the protoconid seems slightly 

 smaller and the heel portion relatively larger than in C. india- 

 nensis, though the metaconid is relatively small compared with 

 the hypoconid. The proportions of the talonid region with 

 reference to the trigonid portion of the tooth are much as in 

 the Kecent wolves. 



In another specimen (no. 10733), of nearly the same dimen- 

 sions, from this locality the hypocone of M 1 is smaller than in 

 specimen 11283, though larger than in the typical C. indianensis. 

 The anterior extension of the hypocone ridge around the anterior 

 side of the protocone is also interrupted as in C. indianensis. 

 M 2 is in this specimen of the narrow form with small metacone 

 and hypocone as in no. 11283. P 3 differs from the correspond- 

 ing tooth of C indianensis in being very narrow instead of wide 

 posteriorly, and in the almost entire absence of a posterior basal 

 tubercle behind the posterior cusp. The portion of the palatine 

 region represented suggests narrowing anteriorly. This speci- 

 men almost bridges the gap between the C. occidentalis and the 

 C. indianensis types but is nearest to C. occidentalis furlongi. 



Measurements. 



No. 11283 No. 10733 



Length, posterior side of superior canine to posterior side 



M= 81.5 mm. 



Length, anterior side P* to posterior side M 2 44.7 



P*, anteroposterior diameter 23.6 24 mm. 



M 1 , anteroposterior diameter along outer border 16 15.5 



M 1 , greatest transverse diameter 19.3 18 



M 2 , anteroposterior diameter along outer border 8 8.2 



M : , greatest transverse diameter 10.8 10.5 



Width, from outer side of alveolus of M 1 to median line 39 37.7 



Width, from outer side of alveolus of P 1 to median line 18 



M x , anteroposterior diameter : 27 



Mj, thickness measured across protoconid 11.5 



Mj, anteroposterior diameter „. 11 



