132 



INDEX. 



Page. 



Oreodon, graeilis 106 



hybridus 104 



macrorhinus 106 



periculorum 106 



Oreodon zone, fauna of 62-63, 105-106 



homotaxis of 62 



figure showing 23, 62, 64, 65 



Oreodontidae 63, 



64, 66; 68, 69, 73, 74, 75, 78, 80, 81, 82, 100, 

 103, 104, 106,109,111,113,115,117,119 



Oreodontinae 57,61 



Orohippus 49,52,102 



agilis 98 



ballardi 98 



cinctus 98 



major 98 



osbomianus 98 



procyoninus 98 



pumilus 98 



sylvaticus 98 



uintanus 98 



Orohippus zone, fauna of 50,95-98 



homotaxis of %2, 50-53 



figures showing 23,51 



Oromeryx 103 



pHcatus 100 



Orotherium 102 



Osborn, H. F., on divergent evolution 42 



on Great Plains deposition 27 



papers by 10,11,12,16 



Osborn, H. F., and Earle, Charles, paper by. 12 

 Osborn, H.F., and Wortman, J. L., paper by. 12 



Ovibos 87,89 



Ovinse 86,89 



Oxyacodon 101 



agapetillus 92 



spiculatus 92 



Oxyaena 38,45,100 



forcipata 93 



huerfanensis 49,93 



lupina 93 



morsitans 93 



sp 93 



Oxysenidse . 37, 40, 45, 46, 48, 52, 54, 57, 93, 96, 98, 100 



Oxyaenodon .100 



dysclerus 98 



dysodus 98 



Oxyclaenidse 33,34,35,91,101 



Oxyclaenus 101 



cuspidatus 91 



simplex 91 



Oxydactylus 72,74,78,120 



brachiceps 114 



longipes 114 



P. 



Pachyaena 45,101 



gigantea 93 



intermedia 93 



ossifraga 93 



Paciculus 110 



insolitus 107 



lockingtonianus 107 



Palaearctomys 118 



macrorhinus 116 



montanus • 116 



vetus 116 



Page. 



Palaeictops 38, 45, 46, 101 



bicuspis 93 



Palaeolagus 110 



agapetillus 108 



brachyodon 104 



haydeni 105 



intermedius 108 



temnodon 104 



turgidus 105 



Palaeomeryx 77,78,80 



americanus 118 



antilopinus 115 



borealis 115 



teres 118 



trilateralis 118 



sp 115,118 



Palaeonictidae 40, 42, 46, 93, 100 



Palaeonictis 100 



occidentalis 93 



Palaeosinopa 45,101 



didelphoides 93 



veterrima ' 93 



Palaeosyopinae sp 98 



Palaeosyops 49,54,102 



borealis 44,45,51 



fontinalis 98 



humilis 98 



major 98 



paludosus 98 



robustus 98 



Panochthus 83 



Panolax 118 



sanctaefldei 116 



Pantolambda 35.102 



bathmodon 92 



cavirictus 92 



Pantolambda zone, fauna of 34-35,91-92 



homotaxis of 34 



figure showing 23 



Pantolambdidae " 35, 40, 92, 102 



Pantolestes 101 



longicaudus 96 



sp 96 



Pantolestidae 45, 46, 52, 92, 93, 96, 101 



Paradaphaenus 110 



cuspigerus 106 



transversus 106 



Paradoxodon 101 



rutimeyeranus 91 



Parahippus 70, 72, 74, 75, 78, 80, 119 



avus 115 



brevidens 115 



cognatus 117 



eoloradensis 115 



crehidens 113,115 



nebrascensis '. 113 



pawniensis 115 



sp 113,115 



Parahyus 103 



aberrans . . 95 



vagus 95 



Paramylodon 85, 87 



Paramys 38, 40, 46, 49, 50, 57, 59, 61, 101 



atwateri 94 



bicuspis 94 



copei 94 



