Vol. 5] 



Merriam. — John Day Carnivora. 



V.) 



The presence of this short-faced variety in close association 

 with long-faced forms of the same group is another illustration 

 of the interesting tendency toward the evolution of short-faced 

 forms in the John Day. 



MEASUREMENTS. 



a,^ <w « 



a. -=5 a, ak= s,bo 



•"■> p. 



a ° a 5 . 3 - 



>~ c>> ^.P. w*;.P. 



-355 



Length, premaxillary to occipital 



condyle inclusive 134 160 



Length, posterior side of C to pos- 

 terior side of M 1 47* 43.4 50* o51 53 



Antero-posterior diameter of canine 9 11* 



P 1 , antero-posterior diameter 3.8* 4.1 4.5* 4.1 4.6 



P 2 , antero-posterior diameter 8.7* 7 8.5* 8.4 9.+ 



P 3 , antero-posterior diameter 9 8.4 9.5 9.6 10.+ 



P J , antero-posterior diameter 12.5 14.2 15 13.6 14.2 



P 4 , transverse diameter across deu- 



terocone 7 8.3 9* 8.4 8.6 



M 1 , antero-posterior diameter 8 8.5 9* 9 9.8 



W, transverse diameter 11 14.3 15* ol3.4 15.3 



M 2 , antero-posterior diameter 4 4.3* 5 5.2 



M 2 , transverse diameter 7.5 8* 9 9.7 



Width of palate between deutero- 



cones of sectorials 26 26.5* 



Width between canines 17 17 



Length postorbital process to inion 74 86* 



Greatest transverse diameter of 



brain case 43.5 45* 



Greatest height of brain case above 



meatus auditorius 32 32* 



MESOCYON JOSEPHI Cope (?). 



Temnocyon joseplii Cope, Bull. U. S. Geol. Surv. Terrs., Vol. 6, p. 179; 

 and Tertiary Vertebrata, p. 912. 



H ypotcmnodon josephi (Wortman and Matthew), Bull. Am. Mus. Nat. 

 Hist., Vol. 12, p. 130. 



Mesocyon joseplii (Hay), Bull. U. S. Geol. Survey. No. 179, p. 773. 



A mandible somewhat smaller than the lower jaw of M. cory- 

 phaeus figured by Cope is not far from the size required for the 



*" In the absence of other data, these measurements are taken from 1 

 Cope's figures of the type (op. cit., Pis. 70 and 71), and will probably be 

 found to differ slightly from the exact measurements of the specimen. 



a Approximate. 



