CANID^. 905 



third does not exhibit any posterior marginal lobe. The sectorial is small 

 for the size of the other teeth, not quite equaling that of the Canis latrans. 

 Its anterior inner tubercle is i^rominent and acute, but of small size. The 

 tubercular teeth are relatively large, equaling those of the wolf in trans- 

 verse diameter, but not in anteroposterior. They have a wide internal 

 cingulum, and a single low median tubercle separated by a deep valley 

 from the two prominent external cusps. These are bounded externally by 

 a well-marked cingulum. Enamel wrinkled where not worn. 



Measurements. 



M. 



Length of siiperior dental series on base, from canine 070 



Length of crown of canine 030 



^.. . .■ i • .^anteroposterior 019 



Diameters 01 sectorial •; '^ . „,.,, 



I transverse in trout Ui.K) 



^. ea i^ 1 (anteroposterior 014 



Diameters of tirst trne molar { ^ ,, 



( transverse -U^u 



,^. ^1. 1 S anteroposterior 0075 



Diameters of .seconil true molar ; ^ ,^, , 



I transverse "Jl* 



Length of series of inferior premolars 046 



From the John Day Miocene of the John Day River, Oregon. Found 

 by C H. Sternberg and J. L. Wortman. 



Temnocyon wallovianus Cope. 



Bulletin U. S. Geo!. Surv. Terrs., VI, p. 179, Feb. 11, 1881. 

 Plate LXX : fig. 10. 



This species of Temnocyon is more nearly related to the T. altigenis 

 than to any other member of the genus. Its anterior dentition is much 

 like that of the species named, but the tubercular molars are not larger 

 than those of the T. cori/phccus. While they differ in details of composi- 

 tion from those of the latter species, they differ also from those of T. alti- 

 genis. The species is only known from a cranium from which all posterior 

 to the orbits is lost. Its molar teeth, and most of the incisors, are in good 

 preservation. 



The first molar is one-rooted, and the posterior outline of its crown is 

 quite oblique The posterior borders of the crowns of the second and third 

 are without di.stinct lobes. The sectorial has the same size as that of T. 

 altigenis Its blades are not very acute, nor close together. The inner 



