218 
Sazicavide, 86. 
Schizodus, 40. 
Scaphites, 73, 82. 
Section of Pliocene beds, 32. 
Section, vertical, of the Cretaceous 
formations of Nebraska, so far as 
determine 
Section, senecal, Black Hills, 22. 
Section at Wood’s Bluffs, 8. 
Section.of Carboniferous Suietanes: 
5, 40-52. 
Section Cretaceous rocks, 20, 69, 
0, 72. 
Section of Tertiary beds of O’Fal- 
lon’s creek on the Yellowstone, 98. 
Section Tertiary rocks, 21, 96, 105. 
Selenite, 76. 
Shale, ash-colored, 25. 
Shunganunga mound, 44. 
Shyenne river, 19, 69, 105. 
Siam, 130. 
Silurian, Potsdam sandstone, 21, 26, 
28, 33, 36. 
Bisailarily of Cretaceous forms to 
Tertiary, 
Simpson, Ga: 126. 
Simpson, Mr., travels in the Hud- 
Smith’s, or Kamas river, 121. 
Smithsonian Institution, 3. 
Smoky Hill, 39. 
Smoking-earth river, 78. 
Snake river, 121. 
Snowy Mountains, 34. 
Solarium, 85. 
Soldier creek, 39. 
Solemya, 50, 89. 
Solemyide, 89. 
Solen, 69, 89. 
Solenidae, 87. 
Solidula, 86. 
Solidulide, 86. 
Solidungula, 106. 
Solomon’s fork, 39. 
Southern Africa, 130. 
Spherium, 103. 
ON THE GEOLOGY 
| Tekama, 8. 
AND NATURAL HISTORY OF THE 
Spirigera, 5, 6. 
Spoon Hill — 14. 
Spontaneous ignition of Lignite beds, 
75, 98, 99 
Square Buttes, 34. 
St. Louis, 115. 
St. John’s, 10. 
Stansbury’s report, 37. 
Steneofiber, 107. 
Stevens, Gov., 115. 
“Stone Walls,” 125. 
Stratification, cross or false, 7. 
Strombide, 84. 
Sturgis, Dr., 9. 
Stylemys, 107. 
Succinea, 105. 
Sulphur, 76. 
Swallow, Prof., 54. 
Sweet-water Mountains, 119. 
Syenite, 35. 
Synocladia, 46. 
Syringopora, 22. 
Tancredia, 88. 
Tectura, 85. 
Tellina, 87. 
Tellinide, 87. 
Terebratula, 22. 
Teredo, 86. 
Terres, Mauvaises, of White river, 3. 
Tertiary, 12, 15, 16, 21, 29, 33, 
92, 124, 125, 129, 130. 
Tertiary Basins of the Upper Mis- 
souri, 92. 
Tertiary Basin of White and Nio- 
brara rivers, Les Mauvaises Ter- 
res, 104. 
Tertiary deposits, Loup fork group, 
2, 14. 
White river group, 16, 20,21, 27. 
Tertiary beds jutting against lille 
Thunder Butte, 99. 
Titanotherium, 106. 
Titanotherium bed, 29, 30, 31, 32. 
Tongue river, 119, 
Topeka, 
UPPER MISSOURI. 
Trap dikes, 35. 
Triassic, or New Red Sandstone, 
3. 
Trilobites, fragments of, 26, 111. 
Trois Tetons, 1 
Tubicola, 81. 
Turritide, 84. 
Turtle Hill, 33. 
United States, 38. 
Upper Missouri country, 1, 73. 
Upper Mill creek, 45. 
Valvata, 102. 
Valvatide, 102. 
Vaughan, A. J., 4. 
Vermetes, 25. 
Vermilion creek, 47. 
Veneride, 88. 
Venus, 88. 
Vertebrata, 91, 106. 
War Department, 115. 
Warm Spring, 15. 
Warren, Lieut. G. K., 12, 18, 36. 
Wasatch Mountains, 119. 
White river, Bad Lands, 4, 16, 17, 
30, 31, 104, 105, 129. 
White river Valley, 14, 104, 105. 
Willow Springs, 126 
Wind river, 118. 
Wind river mountains, 118, 119. 
Wolverine, Gulo luscus, 138. 
Wood, silicified, 9. 
Worthen, A. H., 38. 
Wounded Knee creek, 32. 
Xylophaga, 86. 
Aystracanthus, 40, 67. 
Yellow marl formation, 108, 109. 
Yellowstone, 8. 
Yoldia, 90. 
Yucca, 14. 
Zamites, 123. 
Zeandale, 47, 48. 
