II ADVERTISEMENT. 



XVII. Seveuteenth Animal Report of the I'nited States (ieological Survey, 1895-'96, Charles D. 

 Walcott, Director. 1896. 8°. 3 pt. iu 4 vol. xxii, 1076 pp., 07 jil. ami iiiap.s; xxv, 864 pp., 113 ])1. and 

 maps; xxiii, 542 pp., 8pl. and maps ; )ii, 543-1058 pp., 9-13 pi. 



XVIII. Eighteenth Annual Ileport of the United States Geological Survey, 1896-'97, Charles D. 

 Walcott, Director. 1897. (Parts II and III, 1898.) 8^. Spt.iiiOvol. 440 pp., 4 pi. and maps; v, 653 pp., 

 105 pi. and maps; v, 861 pp., 118pl. and maps; x, 756]ip., 102 pi. and maps; xii, 642 pp., 1 pi. ; 643-1400pp. 



XIX. Nineteenth Annual Itepoit of the United State.s Geological Survey, 1897-98, Charles D. 

 Walcott, Director. 1898. (Parts II, III, and V, 1899.) 8°. 6 pt. in 7 vol. 422 pp., 2 maps; v, 958 pp., 

 172 pi. and maps; v. 785 i)p., 99 pi. and maps; viil, 814 i)p., 118 pi. and maps; xvii, 400 pp., 110 ])1. and 

 maps; viii, 051 pp., 11 pi.; viii, 706 pp. 



XX. Twentieth Annual Ileport of the United States Geological Survey, 1898-"99, Charles D. M'al- 

 cott. Director. 1899. (Parts II, III, IV, V, and VII, 1900.) 8°. 7 pt. in 8 vol. 551 pp., 2 maps ; v, 

 953 pp., 193 pi. and maps; v, 595 pp., 78 pi. and maps; vii, 660 pp., 75 pi. and maps; xix, 408 pp., 159 

 pi. and maps; viii, 616 pp. ; xi, 8 4 pp., 1 pi.; v, 509 pp., 38 pi. and maps. 



MOXO(JKAPHS. 

 , I. Lake Bonneville, by Grove Karl Gilbert. 1890. 4°. xx, 438 pp. 51 pi. 1 map. 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. 



III. Geology of the Comstock Lode and the Washoe District, with Atlas, by George F. Becker. 1882. 

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



IV. Comstock Mining aii<l Miners, by Eliot Lord. 1883. 4°. xiv, 451 pp. 3 jd. Price $1.50. 



V. The Copper-Bearing Rocks of Lake Superii>r, by Roland Duer Irving. 1883. 4^. xvi,464 pp. 

 15 1. 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. 54 1. 54 pi. Price $1.05. 



VII. Silver- Lead Deposits of Eureka, Nevada, by Joseph Story Curtis. 1884. 4". xiii,200pp. 16 

 pi. Price $1.20. 



VIII. Paleontology of the Eureka District, by Charles Doolittle Walcott. 1884. 4°. xiii, 298 pp. 

 24 L 24 pi. Price $1.10. 



IX. Brachiopoda and Lamellibrancbiata of the Raritan Clays and Greensand JIarls of Ne Jersey, 

 byllobertP. Whittield. 1885. 4^. xx,338pp. 35 pi. 1 map. Price $1.15. 



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

 1886. 4°. xviii, 243 pp. 56 1. 50 pi. Price $2.70. 



XI. Geological History of Lake Lahontan, a Quaternary Lake of Northwestern Nevada, by Israel 

 Cook Russell. 1885. 4°. xiv, 288 pp. 46 pi. and mai)s. Price $1.75. 



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

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



XIII. Geology of the Quick.silver Deposits ot the Pacific Slope, with Atlas, by (leorge F. Becker. 

 1888. 4°. xix, 486 pp. 7 pi. and atlas of 14 sheets folio. Price $2.00. 



XIV. Fossil Fishes and Fossil Plants of the Trias.sic Rocks of New Jersey and the Connecticut Val- 

 ley, by John S. Newberry. 1888. 4'^. xiv, 152 PI). 26 pi. Price $1.00. 



XV. The Potomac or Tounger Mesozoic Fhu'a, by William ^lorris Foiit;iiue. 1889. 4°. xiv, 377 

 pp. 180 pi. Text and phites 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. 



XVII. The Flora of the Dakota Group, a Posthumous Work, by Leo Lesquereu.\. Edited by F. H. 

 Knowlton. 1891. 4^ 400 i)p. 66 pi. Price $1.10. 



XVIII. Gasteropoda iind Cephalopoda of the Raritan Clays and (Jreensand 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 Rcdand D.Irving 

 and C. R. Van Hise. 1892. 4°. xix, 534 pp. 37 id. Price $1.70. 



XX. Geology of the Eureka District, Nevada, with Atlas, by Arnold Hague. 1892. 4'^. xvii, 419 pp. 

 8 pi. Price $5.25. 



XXI. The Tertiary Rhynchophorous Coleoptera of North America, by Samuel Hubbard Scudder. 



1893. 4°. xi, 206 pp. 18 pi. Price 90 cents. 



XXII. A Manual of Topographic Methods, by Henry Gannett, Chief Topographer. 1893. 4'=. xiv, 

 300 pp. 18 pi. Price $1.00. 



XXIII. Geology of the Green Mountains in Massachusetts, by Raphael Pumpelly, J. E. Wolff, 

 and T. Nelson Dale. 1894. 4°. xiv, 206 pp. 23 pi. Price .$1.30. 



XXIV. MoUuscaand Crustacea of the Miocene Formations of New Jersey, by Robert Parr Whitfield. 



1894. 4°. 195 pp. 24 pi. Price 90 cents. 



XXV. The Glacial Lake Agas.siz, by Wanen Upham. 1805. 4° xxiv, 658 pp. 38 pi. Price $1.70. 



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

 Arthur Hollick. 1895. 4°. 260 pp. 58 pi. Price $1.00. 



XXVII. Geology of the Denver Basin, Colorado, by S. F. Emmons, Whitman Cross, and George H. 

 Eldridge. 1896. 4°. 556 pp. 31 pi. Price $1.50. 



