Colorado, 122. 
Columna, 00. 
Compsemys, 101. 
Columbia, 119. 
Company, American Fur, 3. 
Conchifera, 86. 
Conglomerate, 6, 105, 133. 
Conrad, T. A., 2. 
Corbula, 87, 103. 
Corbulide, 87, 103. 
Cottonwood Valley, 39. 
Cottonwood Creek, 16, 39. 
Corbicula, 103. 
Corbulamella, 87. 
Couch, Lieut., 138. 
Council Grove, 39. 
Crassatella, 89. 
Cretaceous formation No. 1, 70; 
formation No. 2, 72; formation 
No. 3,78; formation No. 4, 76; 
formation No. 5, 79. 
Cretaceous, 4, 6, 9, 20, 32, 48, 56, 
57, 68. 
Cretaceous No. 1, lower, 6, 70; 
Nos. 1, 2, 3, 4, 5, 20. 
Cretaceous system, upper, middle, 
and lower, 68. 
Crinoids, 40. 
Cuccullcea, 90. 
Culbertson, Thaddeus A., 3. 
Culbertson, Alexander, 4. 
Cyathocrinus, 51. 
Cyathophylloid corals, 41. 
Cyclas, 108, 181. 
Cylichna, 86. 
Cylichnide, 86. 
Cyprina, 88. 
Cypris, 107. 
Cyprinide, 88. 
Cyrena, 1038. 
Cyrenide, 103. 
Cytherea, 10, 88. 
Dakota city, 10. 
Dearborn river, 115. 
Decatur, Stephen, 5. 
Deep creek, 47. 
Deer’s Ears, 28. 
Deinictis, 107. 
Dentalium, 85. 
Devonian, or Old Red, 37. 
Dicotyledonous trees or leaves, 9, 
94, 97, 98, 126. 
OF THE UPPER MISSOURI. 
Dicotyledonous leaves, fossil, 68, 71. 
Dip of Carboniferous beds in Kan- 
sas, 57. 
Discina, 51. 
Dixon’s bluffs, 73. 
Dorion’s hills, 73. 
Drift, deposit of, 29, 108. 
Echinoderms, 79. 
Echinodermata, 61. 
Ldmondia, 50. 
Elephas, 13, 106. 
Elkhorn river, 5. 
Limys, 101. 
Engelman, Mr., 58. 
England, fossils from, 38. 
Entelodon, 106. 
Kocene period, 129. 
Epicyon, 107. 
Lquisetum, 70. 
Equus, 107. 
Erratic block deposit, 108, 110. 
Eruptive rocks, 33, 119. 
Hucastor, 107. 
Huelephas, 106. 
Humys, 107. 
Huomphalus, 22, 66. 
Hurope, Permian beds of, 38. 
Evans, Dr. John, 3. 
Fasciolaria, 84. 
Fasciolaride, 84. 
Felis, 107. 
Fenestella, 41. 
First Cedar island, 75. 
Fish remains, fossil, 28. 
Flora Tertiaria Helvetiee, 130. 
Foraminifera, 61. 
Forest trees, limits of, 10. 
Formation No. 5, vertical section, 
79. 
Formation No. 4, general section, 
cretaceous, 76. 
Fort Benton, 4, 125. 
Fort Berthold, 95. 
Fort Clark, 21. 
Fort Laramie to the Black Hills, 
geology of, 17. 
Fort Leavenworth, 40. 
Fort Lisa, 8. 
Fort Pierre, 3. 
Fort Riley, 50, 51. 
Fossar, 85. 
Fossil leaves, 28. 
215 
Fox ridge, 78, 80. 
Fremont, Col., 57. 
Fresh-water deposit, 23. 
Fucoidal markings, 48. 
Fungide, 91. 
Fusilina cylindrica, 5, 61. 
Fusulina, occurs in Russia, 53. 
Fusus, 83. 
Fusus Haydent, 80. 
Gallatin fork, 121. 
Gasteropoda, 79. 
General section of the rocks in Kan- 
sas Valley, from the Cretaceous 
down, so as to include portions 
of the Upper Coal Measures, 50. 
Geological sections, general ; gene- 
ral section of the geological for- 
mations seen in and near the 
Black Hills, 22. 
Vertical section of the Creta- 
ceous formations of Nebraska 
territory, so far as deter- 
mined, 69. 
Vertical section, showing the 
order of superposition of the 
different beds of the Tertiary 
basin of White and Niobrara 
rivers, 104. 
Geological sections, local ; Carboni- 
ferous, 5, 6, 26, 27, 40, 41, 42, 
44, 45, 46, 47, 48. 
Cretaceous, 8, 9, 20, 70, 72, 
73, 78. 
Tertiary, 12, 13, 20,21, 29, 31, 
32, 95, 94, 95, 96, 98, 100. 
Azoic rocks, 18, 19, 26. 
Geographical distribution of mam- 
mals, 138, 139. 
Gervilia, 79, 89. 
Girdle Mountains, 34. 
Gold discoveries, 59. 
Golden Spring, 8. 
Goldfuss, 2. 
Grand river, 78. 
Grand Saline river, 50. 
Granitic rocks, description of, 33. 
Granite, feldspathic, 23. 
Grasshopper creek, 42, 43, 44. 
Great Bend, 2, 69, 76. 
Great Salt Lake City, 37. 
Great Lignite Tertiary basin, 78, 
79, 92. 
