128 



INDEX. 



Page. 



Hyracoidea 33 



Hyracops 102 



Hystricomorpha 88,89 



I. 



Icticyon sp 114 



Ictops 110 



acutidens 103 



bullatus 105 



dakotensis 105 



intermedins 103 



major 103 



montanus 103 



porcimis 105 



tenuis 103 



thompsoni 103 



Indrodon 35,101 



malaris 92 



Insectivora ' 33, 34, 40, 45, 



46, 52, 56, 58, 59, 61, 63, 64, 75, 90, 92, 93, 

 95, 96, 99, 101, 105, 107, 110, 112, 114, 118 



Irving, J. D., paper by 15 



Ischyrocyon 80,118 



hyaenodus 115 



Ischyromyidae 54,57, 



61, 63, 66, 94, 97, 99, 101, 104, ia5, 110 



Ischyromys 61,110 



cristatus 105 



typus 105 



veterior 104 



Isectolophus 102 



annectens 99 



latidens 98 



modestus 98 



Ithygrammodon 103 



cameloides 98 



John Day, Oreg., fauna of 106-109 



John Day formation, fauna of. 64^69, 106-111 



homotaxis of 22,64-69 



figures showing 23, 65, 67 



Johnson, W. D., pax)ers by. 



K. 



King, on volcanic ash 



10 



24 



Knight formation, homotaxis of, figures 



showing 23,39 



Knowlton, F. H., paper by 15 



Lacertilia 47 



Lacustrine theory, history of 26-28 



Lambdotherium 41, 44, 45, 46. 47, 48, 102 



popoagicum 46,47,49,95 



primaevum 38,48 



Lambdotherium zone, fauna of 43-47, 49,92-95 



homotaxis of 22, 43, 47, 48 



figures showing 23, 38, 44 



Laramie formation, homotaxis of, figure 



showing 39 



Laramie Peak, Wyo., fauna near 112-114 



Laurus 78 



Leidy, J., on Loup Fork fauna 83 



Leidy. J., and Lucas, F. A., paper by 15 



Leporidae 61, 66, 68, 104, 105, 108, 110, 113, 116, 119 



Page. 



Leptaceratherium ill 



trigonodon 104,105 



Leptarctus 80,118 



primus 116 



Leptauchenia 64, 66, 69, 70, 72, 73, 75, 78, 111, 119 



decora 73,113 



major 113 



nitida 73,113 



sp 106,109,113 



Leptauchenia zone, fauna of 63,64, 106-109 



homotaxis of 53 



figure showing 23, 62, &i, 65 



Leptictidfe 45, 46, 52, (il, 93, 96, 101 , 103, 105, 110 



Leptictis no 



haydeni 105 



Leptochcerida? 63, 69, 104, 106, 109, 111 



Leptochoerus ill 



gracilis 106 



lemurinus 106 



robustus 106 



si)ectabins 106 



sp 109 



Leptomeryx ill 



esulcatus 104 



evansi 106 



transmontanus 109 



sp 104,106 



Leptoreodon 103 



marshi 100 



Leptotragulus 103,111 



\?exis '. 100 



proavus 100 



profectus 104 



sulcatus 100 



sp.... 100 



Lepus 68,75,85,90,110 



ennisianus 108 



macrocephalus 113 



primigenius 113 



sp 116 



Ligurien etage, homotaxis and fauna of 54 



Limnenetes Ill 



anceps 104 



platyceps 104 



Limnocyon 45,100 



verus 96 



sp 93,96,98 



Limnohyops 102 



diaconus 98 



laticeps 98 



Little White River. S. Dak., fauna of 115-118 



Loomis, F. B., on Bighorn Basin 41 



on "Wind River formation 47 



papers by 11,15 



Lophiodon oregonensis 108 



Lophiodontidae 30, 38, 40, 41, 46, 52, 54. 57, 61, 



63, 94, 98, 99, 102, 104, 105, 111 



Loup Fork fauna, identity of 79, 83-84 



Lower Brule Creek S. Dak., fauna of 105-106 



Loxolophodon 54 



semlcinctus 54 



Loxolophus 101 



attenuatus 91 



hyattianus 91 



priscus 71 



Lucas, F. A. , and Leidy, J. , paper by 15 



