DAKOTA AND NEBRASKA. 



21 



A B C D 



E 



P. occidental is, 

 P. gracilis, 



Homocamelus cfininus, 

 Protomeryx Halli, 

 Megaloraeryx Niobrarensis, 

 Merycodus necatus. 

 Leptomeryx Evansi, 

 Cervus Warreni, 

 Cosoryx furcatus. 



Pachyderm AT A artiodacttla. 



Elotheriurn (Entelodon) Mortoni, . 



E. ingens, . . . 



E. ingens, large var., 



Perchoerus probus, .... 



Leptochoerus spectabilis, 



Dicotyles? ..... 



Pachydermata Perissodactyla. 



Hyopotamus americanus, 

 Rhinoceros occidentalis, 

 R. crassus, 



Hyracodon Nebrascensis, 

 Titanotherium Prouti, 

 Lophiodon occidentalis, 

 Mastodon mirificns, 

 Elephas imperator, . 



SOLIDUNGTJLA. 



Equus excel us, 

 Protohippus perditus, 

 P. placidus, 

 Hipparion occidentale, 

 H. speciosum, 

 H. affine, 

 H. gratum, . 

 Merychippus insignis, 

 M. mirabilis, 

 Anchitherium Bairdi, 

 Hypoliippus affinis, 

 Parahippus cognatus, 



RODENTIA. 



Palfeolagus Haydeni, 



Ischyromys typus, . 



Palgeocastor (Steneofiber) Nebrascensis, 



Euniys elegans, . ... 



Castor tortus, 



Hystrix venustus, . 



Leptictis Haydeni, 

 jctops Dakotensis, 



Insectiyora. 



X 

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X 

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X 

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p 



X 

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X 

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X 



X 



X 

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X 

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X 

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X 



X 



Ix 



X 

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X 

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X 

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