University of California Publications. 



[Geology 



INTRODUCTION. 



In 1S99 and 1900 field parties from the University of Cali- 

 fornia, working under the direction of the writer, collected over 

 the greater part of the exposed area of the Tertiary formations 

 in the John Day Valley of Eastern Oregon. In the fall of 1900 

 L. S. Davis and V. C. Osmont continued in the field after the 

 University party had returned, and made additional collections, 

 particularly in the region of the Crooked River and Logan Butte, 

 south of the John Day Basin. The collections of Osmont and 

 Davis were purchased for the University, and the material now 

 available may be considered representative of all the phases of 

 the faunas of the John Day region. The new rodent and ungu- 

 late material from these collections has already been discussed by 

 Dr. Sinclair. 1 In the following paper there are presented such 

 additions to our knowledge of this fauna as have been obtained 

 from a study of the carnivore material. 



In the preparation of this report the writer has been espec- 

 ially indebted to Professor II. F. Osborn and Dr. AV. D. Matthew 

 of the American Museum for courtesies extended during the ex- 

 amination of the Cope collection of John Day types. Dr. Mat- 

 thew has also very kindly made numerous examinations of types 

 for me while the material was in the process of description. Pro- 

 fessor W. B. Scott and Dr. Marcus Farr have shown me the types 

 of John Day Carnivora at Princeton University, and Dr. Sinclair 

 has recently reexamined several types at my request. 



In working over the subject of variation in the dentition and 

 skull characters of the recent Canidae, Dr. C. Hart Merriam and 

 Mr. Vernon Bailey have furnished most valuable data. In the 

 examination of the Canidae, Mr. Bailey has worked over a very 

 large series of sknlls and has reported on over fifteen hundred 

 examinations. 



In justice to the artist and engraver, it should be stated that 

 the illustrations accompanying this paper were reproduced from 

 the first rough proofs, the original plates and drawings having 

 been destroyed in the San Francisco fire of April eighteenth. 

 1 W. J. Sinclair. Bull. Dept. Geo!., Univ. Cal., Vol. 4, No. 6. 



