216 
Green river, 121. 
Green river mountains, 119. 
Green river valley, 105. 
Grindstone hills, 105. 
Gros Ventres fork, 122. 
Guadalupe mountains, 38. 
Gulf States, 130. 
CGryphea vesicularis, 81. 
Gypsum-bearing beds of Kansas, 
56. 
General description of Kansas, 59. 
Hall, Prof., 4, 37, 39. 
Hamites, 82. 
Harris, Mr. Edward, 8. 
Hawn, Mr., 38. 
Heer, Dr., 130. 
Helcion, 85. 
Helena, 66. 
Helicide, 102. 
Lelicoceras, 82. 
Helix, 102, 10, 105, 181. 
Henry, Prof., 131. 
Hettangia, 68, 88. 
Highwood Mountains, 119. 
Hines, Dr., 127. 
Hipparion, 13, 106. 
Hipponyx, 85. 
Hippotherium, 106. 
Hippuritide, 91. 
Hornblende, steel gray, 18. 
Horseshoe creek, 16. 
LHycenodon, 107. 
Hydrated peroxide of iron, 76. 
Hyopotamus, 106. 
Hypohippus, 106. 
Hyracodon, 106. 
Hystrix, 107. 
Hystricops, 107. 
Illinois, Permian fossils of, 38. 
Impressions of leaves, fossil, 9. 
Indianola, 39. 
Inoceramus, 21, 89. 
Inoceramus problematicus, 10, 69, 
81, 89. 
Introduction, historical, 1. 
Inyankara Paha, or Stone Peak, 24. 
Towa report, 39. 
Isbister, Mr., 36. 
Ischyromys, 107. 
Ischyrotherium, 101. 
Isthmus of Darien, 126. 
Jackson’s hole, 119. 
James river, 69. 
Jefferson fork, 121. 
Johnson, Prof., 3. 
Judith mountains, 34, 120. 
Judith river, 109. 
Jura of Europe, 67. 
Jurassic System, treated of, 67. 
Zone around Black Hills, 27. 
Jurassic, 16, 22, 23, 24, 25, 26, 
27, 38, 56, 67. 
Kansas, 38, 39. 
Keuper (Upper Trias), 123. 
King, Prof., 61. 
Lake Superior, 36. 
Lake Utah, 122. 
La Bonte creek, 120. 
Lamellibranchiata, 65. 
Laramie range, description of, 17. 
Laramie range, beautiful valleys of, 
Wie 
Laramie Peak, 18, 35. 
Last creek, 46, 47. 
Lawrence, 39, 43. 
Leavenworth City, 39. 
Leda, 50, 90. 
Ledide, 90. 
Leidy, Prof., 3. 
Leptarctus, 107. 
Leptauchenia, 106. 
Leptocheerus, 106. 
Leptodomus, 40. 
Leptomeryx, 106. 
Lewis and Clarke, 1, 2. 
Lias, 68. 
Lignite Tertiary beds, 16, 28, 92, 
93, 94, 129, 180. 
Lignite, cretaceous, 71. 
Lime, sulphate of, 73. 
Limestone, magnesian, 51. 
Limestone, gray, 74. 
Limestone, carboniferous, 6, 28. 
Limestones, fused, 19. 
Limits of some forest trees, 10. 
Limnea, 8, 102, 104, 180. 
Limopsis, 90. 
Limneede, 102. 
Lingula, 25, 37. 
Little Missouri river, 100. 
Little Rocky Mountain creek, 34. 
Little Stranger creek, 42. 
Lodge Pole creek, 115. 
Loess of the Rhine, 104. 
Long Lake, 69. 
Lost Spring, 39. 
ON THE GEOLOGY AND NATURAL HISTORY 
Loup fork, 11. 
Section of beds, 12. 
Loup fork, geology of, 13. 
Lucina, 88. 
Lucinide, 88. 
LInnatia, 84. 
Machairodus, 107. 
Mackenzie river, 99. 
Macrocheilus, 22. 
Macrobacia, 91. 
Mactra, 72, 87. 
Mactride, 87. 
Mactra, 87. 
Madison fork, 119. 
Margarita, 85. 
Margaritella, 85. 
Mammalian remains, 15. 
Manhattan, 51. 
Marcon, Jules, 37. 
Marl, calcareous, 74. 
Martinia Clannyana, 55. 
Mastodon, 18, 106. 
Medicine Bow mountains, 119. 
Medicine Hills, 33. 
Meek, I. B., 4. 
Megalomeryx, 106. 
Melania, 101. 
Melaniade, 101. 
Merychippus, 106. 
Merychyus, 106. 
Merychocherus, 14, 106. 
Merycodus, 106. 
Meretrix, 88. 
Metamorphic rocks of Black Hills, 
14. 
Mexico, 36. 
Microbacia coranula, 81. 
Milk river, 69. 
Mill creek, 46. 
Minnesota, 80. 
Miocene beds, 14, 104. 
Upper Miocene, 13. _ 
Mission creek, 45. 
Mississippi, 115. 
Missouri river, 1. 
Modiola, 89. 
Moreau trading post, 69. 
Moreau river, 77, 80. 
Morton, Dr., 2, 3. 
Mosasaurus Maximiliani, 2, 91. 
Mud island, 37. 
Multungula, 106. 
Murchisonia, 46. 
