IISriDEX 



Page. 



Introduction 5 



Amia whiteavesiana, Cope 12 



Amia macfospondyla. Cope .... 12 



Amia exilis, sp. nov 12 



Lepidosteus longus, sp. nov 13 



Rhineastes rhmas. Cope 14 



Amiurus cancellatus, Cope 15 



Amiurus maconnHli, Cope , 16 



Anosteira ornata ? Leidy 17 



Stylei^ys nebrascensis, Leidy 18 



Testudo exornata, Lambe 18 



Trionyx leucopotamicus, Cope 19 



Peltosaurus granulosus. Cope 19 



Ogmophis compactus, sp. nov 20 



Crocodilus prenasalis ? Loomis 21 



Didelphys valens, sp. nov , 22 



Ancodus brachyrhynchus, Osborn and Wort- 

 man 24 



Anthracotherium ? pygmceum, sp. nov 25 



Elotherium coarctatum, Cope 26 



Agriochcerus antiquus, Leidy 28 



Merychoidodon culbertsoni, Leidy 29 



Poebrotherium wilsoni, Leidy 30 



Leptomeryx esulcatus, Cope.. 30 



Leptomeryx manimifer, Cope 30 



Leptomeryx speciosus, sp. nov 31 



Leptomeryx sem,icinGtus, Cope 32 



Hypertragulus transversus, Cope 32 



Mesohippus westoni, (Cope) . 33 



Mesohippus prmcocidens, Lambe 34 



Mesohippus propinquus, Lambe 35 



Pack 



Mesohippus brachystylus, Osborn 36 



Mesohippus stenolophus, Lambe 36, 



Mesohippus planidens, Lambe 37 



Mesohippus assiniboiensis, Lambe 37 



Hyracodon nebrascensis, Leidy 39 



Hyracodon priscidens, Lambe 39 



Aceratherium mite, Cope 43 



Aceratherium occidentalie, (Leidy) 44 



Aceratherium exiguum, sp. nov 44 



Leptaceratherium, trigonodon, Osborn and 



Wortman 44 



Megacerops angustigenis, (Cope) 45 



Megacerops selwynianus, (Cope) 47 



Megacerops syceras, (Cope) 48 



Megacerops primitivus, sp. nov 49 



Megacerops assiniboiensis, nom. prov 51 



Ghalicotherium bilobatiim,, Cope 54 



Sciurus 1 saskatchewensis, sp. nov 55 



Ischyromys typus, Leidy 56 



Gylindrodon fontis, Douglass 56 



Eutypomys parvus, sp. nov 57 



Palmolagus turgidus, Cope 58 



Palceolagus haydeni, Leidy 58 



Hymnodon cruentus, Leidy 59 



Eycenodon crucians, Leidy 60 



Hemipsalodon grandis, (Cope) 61 



Cynodictis lippincottianus, (Cope) 61 



Daphcenus felinus, Scott 62 



Protemnocyon hartshornianus, (Cope) 63 



Dinictis felina, Leidy 64 



12529—9 



