362 University of California Publications in Geology [Vol. 7 



Comparative Measurements 



cja ft r< ft 



Length of mandible from anterior side 



of P to posterior side of condyle all2 mm. 107. 103.7 



Height of mandible below protocone of M 20. 22.5 21. 16. 

 Greatest thickness of mandible below 



talonid of M o 10. 9. 8.4 



P , anteroposterior diameter 7.5 8. 6. 



P , anteroposterior diameter 9. 9.3 6.7 7. 



P , anteroposterior diameter 11.5 12. 8.4 8.5 



M , anteroposterior diameter 20. 19.8 15. 17. 



M , transverse diameter of heel <z8.7 8.3 7. 6.5 



v 



M , anteroposterior diameter 11.5 10.1 10.5 9. 



M , greatest transverse diameter 6.8 6.9 6.7 5.7 



Length, posterior side inferior canine to 



posterior side M 63 a 65.5a 61. 



Length, posterior side inferior eanine to 



posterior side P + 33 a 35.5 36. 



a, approximate. 



Tephrocyon rurestris (Condon) 



Cants rurestris Condon. The Two Islands, p. 139, pi. 18, 1902. 

 Tephrocyon rurestris. Merriam, J. C, Univ. Calif. Publ., Bull. Dept. 

 Geol., vol. 5, p. 6, 1906. 



The type specimen was originally no. 382 in the private col- 

 lection of Professor Thomas Condon. It is now in the collections 

 of the University of Oregon. The fragmentary specimen consist- 

 ing of four upper cheek-teeth shown in the lower right hand 

 corner of Condon's figure of Canis rurestris (Two Islands, pi. 

 18) does not pertain to the type of Tephrocyon rurestris. These 

 detached teeth represent a species of Temnocyon, near T. alti- 

 genis Cope from the John Day Series. 



The type specimen, consisting of a good skull with the atlas 

 and a portion of a tibia, was obtained in the Mascall Beds near 

 Cottonwood, Grant County,, Oregon. As nearly as could be 

 determined in conversation with Professor Condon, this speci- 

 men was found at the type locality of the Mascall Beds. This 

 horizon is of Middle Miocene age. Other fragmentary material 

 from the Mascall may represent this species. 



