EDITOR'S PREFACE. ea) 
Reports of Explorations and Surveys * * * fora Railroad from the Missis- 
sippi River to the Pacifie Ocean (Senate Ex. Doc. No. 78, Thirty-third Congress, 
second session), Vol. VI, Washington, 1857. Geological Report, Part II, Washington, 
1856, pp. 1-68. 
Fossil Plants from the Cretaceous of Kansas and Nebraska. (From a letter to 
Meek and Hayden.) [In|] Meek and Hayden: On the so-called Triassic Rocks of 
Kansas and Nebraska. Am. Jour. Sci., 2d ser., Vol. XX VII, 1859, pp. 31-35. (New- 
berry, p. 33.) 
Notes on the Ancient Vegetation of North America. Am. Jour. Sci., 2d ser., 
Vol. XXIX, 1860, pp. 208-218; Canadian Naturalist and Geologist, Vol. VI, Montreal, 
1861, pp. 73-77. 
Note in reply to Mr. Lesquereux (in a letter to the editors). Am. Jour. Sci., 2d 
ser., Vol. XXX, 1860, pp. 273-275. 
Geological Report, Paleontology. Report upon the Colorado River of the West, 
by Lieut. Joseph C. Ives; Part ITI, Geological Report. Washington, 1861. 
Descriptions of the Fossil Plants Collected by Mr. George Gibbs, Geologist to 
the United States Northwest Boundary Commission under Mr. Archibald Campbell, 
United States Commisioner. Boston Jour. Nat. Hist., Vol. VII, 1857-1863 (1862), pp. 
506-524, 
On the Age of the Coal Formation of China. Am. Jour. Sci., 2d ser., Vol. XLII, 
1866, pp. 151-154. 
Descriptions of Fossil Plants from the Chinese Coal-bearing Rocks. Appendix 
No. 1, Pumpelly’s Geol. Researches in China, ete. Smithsonian Contributions, XV, 
1867, pp. 119-123. 
Notes on the Later Extinct Floras of North America, with Descriptions of Some 
New Species of Fossil Plants from the Cretaceous and Tertiary Strata. Aun. Lye. 
Nat. Hist., Vol. LX, New York, April, 1868, pp. 1-76. 
Notes on the Later Extinct Floras of North America, with Descriptions of Some 
New Species of Fossil Plants from the Cretaceous and Tertiary Strata. Am. Jour. 
Sci., 2d ser., Vol. XLVI, 1868, pp. 401-407. 
Geological Report of the Exploration of the Yellowstone and Missouri Rivers, 
by Dr. F. V. Hayden, assistant, under the direction of Capt. (now Lieut. Col. and 
Brevet Brig. Gen.) W. F. Raynolds, Corps of Engineers, 1859-1860. Washington, 
1869. Report on the Cretaceous and Tertiary Plants, pp. 145-174. 
Fossil Plants from the Miocene Tertiary of Oregon. Proc. N. Y. Lye. Nat. Hist., 
Ist ser., 1870, p. 148. 
On Red Sandstone, Containing Impressions of Leaves, Found in Excavating the 
Foundations for the Gas Office in Williamsburg. Proc. N. Y. Lye. Nat. Hist., Ist ser., 
1870, pp. 149-150. 
MON XXVI 2 
