Art. JIL—Observations on the Faunae of the Mioeene 

 Tertiaries of Oregon. 



By £. D. Cope. 



A considerable number of Vertehrata, abuost exckisively Mammalia, 

 have been described by authors from the White Eiver and Pliocene for- 

 mations of Oregon. The descrii^tions are found in Professor Leidy's con- 

 tribution to the Final Report of the United States Geological Survey 

 under Dr. Hayden (Vol. I) ; in those of Professor Marsh in the American 

 Journal of Science ; in a i)aper by Mr. Bettany in the Quarterly Journal 

 of the Geological Society of London for 1876 5 and in a pajjer by myself 

 (Paleontological Bulletin ]S"o. 30) in the Proceedings of the American 

 Philosophical Society, published in December, 1878.* Having recently 

 had the opportunity of inspecting a considerable amount of material from 

 the horizons in question, I give a list of the species which I have observed. 

 A few new ones occur in collections received since the publication of my 

 last paper, and are now described, together with some of interest from 

 the Loup Fork beds of the same region. 



White Biver Fauna. 



TESTTJDmATA. 



Stylemys okegonensis Leidy. 



EODEl^TIA. 



Steneofiber geadatus Cope. '■ 



Steneofiber ? NEBRASCENSis Leidy. 



Meniscomys hippodus Cope. 



Meniscomys multiplicatus Cope. 



Pleurolicus sulcifrons Cope. 



Entoptychus cavifrons Cope. 



Entoptychus planifrons Cope. 



Entoptychus crassiramis Cope. 



Pal^olagus haydeni Leidy. 



* See also the American Naturalist, December, 1878. 



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