1917] 



Merriam: Pliocene Mammalian Faunas 



429 



to consider that the beds are much later than those of the Virgin 

 Valley Middle Miocene, which is of approximately the same facies as 

 the Mascall Middle Miocene of the John Day region. 



The fauna obtained in the Thousand Creek region is as follows: 11 



Thousand Creek Fauna 



Eeptilia 



Ophidian remains 

 Aves 

 — Branta, sp. 

 Insectivora 



Seapanus ?, sp. 

 Carnivora 



Tephroeyon, near kelloggi Merriam 



Aelurodon, sp. 



Canis? davisi Merriam 



Ursus'?, sp. 



Mustela furlongi Merriam 

 Mustelid, indet. 



Taxidea nevadensis Butterworth 

 Pseudaelurus, sp. 

 Felis, sp. a 

 Felis, sp. b 

 Eodentia 



Aretomys nevadensis Kellogg 

 Aretomys minor Kellogg 

 Citellus, sp. 



Aploilontia alexandrae Furlong 

 Mylagaulus monodon (Cope) 

 Dipoides, sp. 



Dipoides lecontei (Merriam) 

 Entoptychus minimus Kellogg 

 Peromyseus antiquus Kellogg 

 Peromyscus?, sp. 

 Diprionomys parvus Kellogg 

 Diprionomys magnus Kellogg 

 Hypolagus vetus (Kellogg) 

 Ungulata 



Pliohippus, near fairbanksi Merriam 

 Hipparion, near oceidentale Leidy 

 i Neohipparion leptode Merriam 

 Teleoceras, near fossiger (Cope) 

 Mastodon (Tetrabelodon?), sp. 

 Pliauehenia 1, sp. 



Camel, ef. Camelus americanus Wortmau 

 Prosthennops?, sp. 

 Large suilline form 

 Splienoplialos nevadanus Merriam 

 Ilingoceros alexandrae Merriam 

 Ilingoceros scliizoeeras Merriam 



ii Merriam, J. C, Univ. Calif. Publ. Bull. Dept. Geol., vol. 6, pp. 199-304, 

 pis. 32-33, 1911; also Butterworth, E. M., Univ. Calif. Publ. Bull. Dept. Geol., 

 vol. 10. pp. 21-24, 1916. 



