n ADVSx^TISEMENT. 



1-653 pp.; 105 pi. and maps; i~v, 1-861 pp., 118 pi. and maps; i-x, 1-756 pp., 102 pi. and maps; i-xii, 

 1-642 pp., 1 pi. ; 643-1400 pp. 



XIX, NiBeteenth Ai3r)nal Beport of the United States Geological Survey, 1897-^98, Charles D. 

 Walcott, Director. 1898. 8*^. 6 pt. in 7 vol. 



MONOGRAPHS. 



I. Lake Bonneville, by Grove Karl Gilbert, 1890. 4°. sx,438pp. 51 pL Imap. Price $1.50. 



II. Tertiary History of the Grand Canon District, with Atlas, by Clarence E. Dutton, Capt., U. S. A. 

 1882. 4*^. xiv, 264 pp. 42 pi, and atlas of 24 sheets folio. Price $10.00. 



ni. Geology of the Comstock Lode and the Wa&hoe District, with Atlas, by George F. Becker. 

 1882. 4°. XV, 422 pp. 7 pi. and atlas of 21 sheets folio. Price $11.00. 



IV. Comstock Mining and Miners, by Eliot Lord. 1883. 4°. xiv, 451 pp. 3 pi. Price $1.50. 



V. The Copper-Bearing Rocks of Lake Superior, by Roland Duer Irving. 1883. 4*^. xvi, 464 

 pp. 151. 29 pi. and maps. Price $1.85, 



VI. Contributions to the Knowledge of the Older Mesozoic Flora of Virginia, by William Morris 

 Fontaine. 1883. 4<^. xi, 144 pp. 64 1. 54 pi. Price $1.05, 



VII. Silver-Lead Deposits of Eureka, Nevada, by Joseph Story Curtis. 1884. 4^. xiii, 200 pp. 

 16 pi. Price $1.20. 



VIIL Paleontology of the Eureka District, by Charles Doolittle Walcott. 1884. 4'^. xiii, 298 

 pp. 24 1. 24 pi. Price $1.10. 



IX. Brachiopoda and Lamellibranchiata of the Raritau Clays and Greensand Marls of New 

 Jersey, by Robert P. Whitfield. 1885. 4^^. xx,338pp. 35 pL 1 map. Price $1.15. 



X. Dinoeerata. A Monograph of an Extinct Order of Gigantic Mammals, by Othniel Charles 

 Marsh. 1886. 4<^. xviii, 243 pp. 561. 56 pi. Price $2.70. 



XL Geological History of Lake Lahontan, a Quaternary Lake of Northwestern Nevada, by 

 Israel Cook Russell. 1885. 4*^. xiv, 288 pp. 46 pi. and maps. Price $1.75. 



XII. Geology and Mining Industry of Leadville, Colorado, with Atlas, by Samuel Franklin 

 Emmons. 1886. 4^. xxix, 770 pp. 45 pi. and atlas of 35 sheets folio. Price $8.40. 



XIII. Geology of the Quicksilver Deposits of the Pacific Slope, with Atlas, by George F, Becker. 

 1888. 4^. xix, 4§6pp, 7 pL and atlas of 14 sheets folio. Price $2.00. 



XIV. Foasil Pishes and Fossil Plants of the Triassic Rocks of New Jersey and the Connecticut 

 Valley, by John S. Newberry. 1888. 4°. xiv, 152 pp. 26 pL Price $1.00. 



XV. The Potomac or Younger Mesozoic Flora, by William Morris Fontaine. 1889. 4"^, xiv, 

 377 pp. 180 pi. Text and plates bound separately. Price $2.50. 



XVI. The Paleozoic Fishes of North America, by John Strong Newberry. 1889. 4^^. 340 pp. 

 53 pi. Price $1-00. 



XVIL The Flora of the Dakota Group, a Posthumous Work, by Leo Lesquereux. Edited by 

 F. H. Knowlton. 1891. 4^. 400 pp. 66 pi. Price $L10. 



XVIII. Gasteropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey, 

 by Robert P. Whitfield. 1891. 4^. 402 pp. 50 pi. Price $1.00. 



XIX. The Penokee Iron-Bearing Series of Northern Wisconsin and Michigan, by Roland D. 

 Irving and 0. E. Van Hise. 1892. 4<^. xix,534pp. Price $1.70. 



XX. Geology of tlie Eureka District, Nevada, with an Atlas, by Arnold Hague. 1892. 4*^, xvii, 

 419 pp. Spl. Price ^.25. 



XXI. The Tertiary Rhynchophorous Coleoptera of the United States, by Samuel Hubbard Scud- 

 der. 1893. 4^. xl, 206 pp. 12 pi. Price 90 cents. 



XXIL A Manual of Topographic Methods, by Henry Gannett, Chief Topographer. 1893. 4^^. 

 xiv, 300 pp. 18 ph Price $1.00. 



XXIIL Geology of the Green Mountains in Massachusetts, by Raphael Pumpelly, T. Nelson Dale, 

 andj. E. WolC 1894. 4°. xiv, 206 pp. 23 pi. Price $L 30. 



XXIV. Mollttsca and Crustacea of the Miocene Formations of New Jersey, by Robert Parr Whit- 

 field. 1894. 40. 193 pp. 24 pi. Price 90 cents. 



XXV. The Glacial Lake Agassiz, by Warren Upham. 1895. 4^. xxiv, 658 pp. 38 pi. Price $1.70. 



XXVI. Flora of the Aniboy Clays, by John Strong Newberry ; a Posthumous Work, edited by 

 Arthur Holliok. 1895. 4<^. 260 pp. 58 pi. Price $1,00. 



XXVII. Geology of the Denver Basin in Colorado, by Samuel Franklin Emmons, Whitman Cross, 

 and George Homans Eldridge. 1896. 4°. 556 pp. 31 pi. Price $1,50. 



XXYIIL The Marquette Iron-Bearing District of Michigan, with Atlas, by C. R. Van Hise and 

 W. S* Bayley, including a Chapter on the Republic Trough, by H. L. Smyth. 1895. 4°. 608 pp. 35 

 pL and atlas of 39 sheets folio. Price $5.75. 



XXIX. Geology of Old Hampshire County, Massachusetts, comprising Franklin, Hampshire, and 

 Hampden Counties, by Benjamin Kendall Emerson. 189^. 4^. xxi, 790 pp. 35 pi. Price $1.90. 



XXX* Fossil Medusie, by Charles Doolittle Walcott. 1898. 4«^. ix, 201 pp. 47 pi. Price $1.50. 



XXXI. Geology of the Aspen Mining District, Colorado, with Atlas, by Josiah Edward Spurr. 

 1898. 4^. XXXV, 260 pp. 43 pi. and atlas of 30 sheets folio. Price $3.60. 



XXXII. Geology of the Yellowstone National Park, Part 11, Descriptive Geology, Petrography, 

 and Paleontology, by Arnold Hague, J. P. Iddings, W. Harvey Weed, Charles D. Walcott, G. H, Girty, 

 T, W. Stanton, and F. H. Knowlton. 1899. 4^. xvii, 893 pp. 121 pi. Price . 



XXXIII. Geology of the Narragansett Basin, by N, S. Shaler, J. B. Woodworth, and August F. 

 FoerBte. 1899. 4^. xx,402pp. 31 pi Price . 



