DAKOTA AND NEBRASKA. 



21 



P. occidentalis, 

 P. gracilis, 



Homocamelus caninus, 

 Protomeryx Halli, 

 Megaloraeryx Niobrarensis, 

 Merycodus necatus, 

 Leptomeryx Evansi, 

 CervLis Warreni, 

 Cosoryx furcatus, 



A B 



C D 



E 



Pachtdermata artiodacttla. 



Elotherium (Entelodon) Mortoni, 



E. ingens, 



E. ingens, large var., 



Perchcerus probus, 



Leptochoerus spectabilis, 



Dicotyles? 



Pachtdermata Perissodacttla. 



Hyopotamus americanus, 

 Rhinoceros occidentalis, 

 R. crassus, 



Hyracodon Nebrascensis, 

 Titanotherium Prouti, 

 Lophiodon occidentalis, 

 Mastodon mirificus, 

 Elephas imperator, . 



Equus excelus, 

 Protohippus perditus, 

 P. placidus, 

 Hipparion occidentale, 

 H. speciosum, 

 H. affine, 

 H. gratum, . 

 Merychippus insignis, 

 M. niirabilis, 

 Anchitherium Bairdi, 

 Hypoliippus affinis, 

 Parahippus cognatus, 



SoLIDUNGtTLA. 



RODENTIA. 



Palaeolagus Haydeni, 



Ischyromys typus, . 



Pala30castor (Steneofiber) Nebrascensis, 



Euniys elegans, 



Castor tortus, 



Ilystrix veuustus, . 



Leptictis Haydeni, 

 Ictops Dakotensis, 



Insectivora. 



X 

 X 

 X 

 X 

 X 



X 

 X 



X 

 X 



X 

 X 

 X 



X 

 X 



X 

 X 



X 

 X 



X 



xl 



X 

 X 



X 

 X 



X 

 X 

 X 



X 

 X 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



X 

 X 



