Article XXIV.— LIST OF THE PLEISTOCENE FAUNA 

 FROM HAY SPRINGS, NEBRASKA. 



By W. D. Matthew. 



In 1893 and 1897 field-parties from the American Museum 

 were sent out by Professor Osborn to collect in the Pleistocene 

 at this locality, a bone-bed near the Niobrara River, not far 

 from Hay Springs. A large collection of horse and camel re- 

 mains was obtained, and a few specimens of other animals. 

 The horses have been carefully studied by Mr. Gidley, the 

 camels by Dr. Wortman ; the remainder of the fauna has been 

 revised and partially studied by the writer, but no results 

 have hitherto been published. A list of the fauna may be of 

 some interest to compare with that found in the Sheridan or 

 Equus Beds at other localities. The appended lists, when 

 based on materials in the Cope Collection, are from deter- 

 minations by Professor Cope, revised in a few cases by the 

 writer. 



Hay Springs, American Museum Collection, 1893 and 1897. 



Canis ? latrans. Lower jaw. 



? Dinocyon or large Ursid. Metacarpal. This bone ap- 

 pears to exceed in size the corresponding parts in any living 

 species of bear. The character of the diaclasts excludes it 

 from the Felidae or typical Canidae, but the Amphicyonine 

 Dogs are somewhat similar, and if not a bear it might repre- 

 sent a very large species of Dinocyon (Borophagiis), a genus 

 known to occur in the late Pliocene (Blanco). 



? Felidae indet. Several species are represented by foot- 

 bones and fragments of limb-bones. 



Fiber zibethicus. A skull and several jaws, all of which 

 come within the limits of variation of the modern muskrat. 



Arvicola, cf. amphibius. Upper and lower jaws. 



Cynomys, cf. ludovicianus. Palate. 



Thomomys sp. indet. Upper and lower jaws. 



Castoroides sp. indet. Teeth, limb-bones, and astragali. 



Mylodon sp. indesc. A complete skull, jaw, and large part 



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