130 



INDEX. 



Page. 



Mesohippus, intermedius 108 



latidens 104 



longicristis 108 



montanensis 104 



obliquidens 106 



precocidens 104 



planidens 104 



propinquus 104 



proteulophus 104 



stenobphus 104 



Mesonychidae 33,34,35, 



37,40,45,46,52,54,57, 90, 91, 93, 96, 98, 101 



Meson yx obtusidens 96 



sp 98 



Mesoreodon 72,73,75,119 



chelonyx 113 



intermedius 113 



latidens 113 



megalodon 113 



Mesotapirus. See Colodon. 



Messinien etage, homotaxis and fauna of 80 



Metacheiromyidse 97,102 



Metaeheirorays 50, 52, 102 



dasypus 97 



marshi 97 



tatusia 97 



sp 97 



Metamynodon 62,111 



platyfrons 105 



sp 99,104 



Metamynodon sandstones, fauna of 63 



homotaxis of 62 



figures showing 22,62,64,65 



Miacidse .. 35,40,42,46,52,54,57,90,91,93,96,98,100 



Miacis 46,100 



hargeri 96 



parvivorus 96 



syl vestris 96 



uintensis 98 



vulpinus 98 



washakius 96 



sp 93,96 



Microclaenodon 101 



assurgens 91 



Micropternodus 110 



borealis 103 



Microsorex 90 



Microsus 98,103 



cuspidatus 98 



Mierosyopidae 46, 52, 93, 95, 100 



Microsyops 49,100 



anneetens 95 



elegans 95 



schlosseri 95 



scottianus 93 



typus 95 



sp 95 



Microtus 90 



Miocene, distribution of, plates showing 7,60 



fauna of 70-81,112-120 



homotaxis of 70-81 



figures showing 64,65 



Miocene, lower, fauna of 70-75, 112-114, 118-120 



homotaxis of 70-75 



figure showing 65 



Page. 



Miocene, middle, fauna of.... 76-78, 114-115, 118-120 



homotaxis of 76-78 



figure showing 65 



Miocene, upper, fauna of 79-81,115-120 



homotaxis of 79-81 



figure showing 65 



Mioclaenus 34,101 



acolytus 92 



inaequidens 92 



,lemuroides 92 



lydekkerianus 92 



turgidunculus 92 



turgidus 92 



Miohippus Ill 



anceps 108 



anneetens 108,113 



condoni 108 



crassicuspis 108 



equiceps 113 



gidleyi 108 



validus 108 



Miolabis 66,74,78,120 



transmontanus 115 



Mixodectes 35, 101 



crassiusculus 92 



pimgens 92 



Mixodectidse 34, 92, 93, 95, 101 



Modernized mammals, invasion of 35 



orders of 33 



Modernization, first stage of 35-42 



second stage of « . 57-69 



third stage of 84-90 



MoUusca 66 



Monroe Creek, Nebr., faimanear 112-114 



Monroe Creek formation, homotaxis and 



faxma of 73 



homotaxis of, figure showing 72 



Montana, fauna of 91-92, 98-100, 103-109 



formations of, homotaxis of 22 



figiire showing 23,65 



Monument Creek formation, description of... 61 



Moropus 72, 74, 111, 113, 119 



distans '. 108 



elatus 113 



oregonensis 108 



senex 108 



sp 115 



Mountain Region, deposits of, correlation of . 31-32 



erosion in 21 



homotaxis of, with plains deposits 22 



figures showing 23 



mammalian life of -. 20, 22 



Tertiary history of 19-25 



Mountains, persistence of 24 



Multituberculata 33, 35, 40, 91 



Muridse 63,66,105,107,110,116,119 



Mustela 80,90,118 



americana 90 



minor 116 



ogygia 114 



parviloba 114 



Mustelidae 60, 61, 63, 66, 74, 80, 83, 85, 89, 



90, 103, 105, 107, 110, 112, 114, 116, 118, 120 



Mylagaulodon 66, 68, 110 



angulatus 107 



