II ADVERTISEMENT. 



Walcott, Director. 1897. (Parts II and III, 1898.) 8=. 5 pt. in 6 vol. 1-440 pp., 4 pi. and maps ; i-v, 

 1-653 pp., 10r> pi. and maps; i-v, 1-861 pp., US pi. and maps; i-x, 1-756 pp., 102 pi. and maps; i-xii, 

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



MONOGRAPHS. 



I. Lake Bonneville, liy Grove Karl Gilbert. 1890. 4=. sx, 438 pp. 51 pi. 1 map. Price $1.50. 



II. Tertiaiv Hi.story oJ'tUe Grand t'anon District, with Atlas, h\ 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 ot the Comstock Lode and the Washoe 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. 54 1. 54 pi. Price $1.05. 



VII. Silver-Lead Deposits of Eureka, Nevada, bv Joseph Storv Curtis. 1884. i°. xiii, 200 pp. 

 16 pi. Price $1.20. 



VIII. Paleontologv of the Eureka District, by Charles DooUttle Walcott. 1884. 4°. xiii, 298 

 pp. 24 L 24 pi. Price $1.10. 



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

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



X. Dinocerata. A Monograph of an E.xtiuct Order of Gigantic Mammals, by Othniel Charles 

 Mar.sli. 1886. 4'^. xviii, 243 pp. 561. 56 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 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, 486 pp. 7 pi. and atlas of 14 sheets folio. Price $2.00. 



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

 Valley, by John S. Newberry. 1888. 4:. xiv,152i>p. 26 pi. Price $1.00. 



X\. The Potomac or Younger Jlesozoic 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. 



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

 F. H. Knowlton. 1891. 4^. 400 pp. 66 pi. Price $1.10. 



XVIII. Gasteropoda and Cephalo])oda 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 C. R. Van Hise. 1892. 4°. xix, 534 pp. Price $1.70. 



XX. Geology of the Eureka District, Nevada, with an Atlas, bv Arnold Hague. 1892. 4" xvii, 

 419 pp. 8 pi. Price $5.25. 



XXI. The Tertiarv Rhvnchophorous Coleoptera of the United States, by Samuel Hubbard Scud- 

 der. 1893. 4\ xi, 206 pp.' 12 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, bv Raphael Pumpellv, T. Nelson Dale, 

 and J, E. Wolfi'. 1894. 4^=. xiv, 206 pp. 23 pi. Price $1.30. 



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

 field. 1894. 4^. 193 pp. 24 pi. Price 90 cents. 



XXV. TheGlacialLakeAgassiz, by Warren Upham. 1895. 4^\ xxiv, 658 pp. 38 pi. Price $1.70. 



XXVI. Flora of the Ambov Clays, by John Strong Newberrv; a Pi^sthumous Work, edited by 

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



XXVII. Geologv of the Denver Basin in Colorado, bv Sanniel Franklin Emn\ons, Whitman Cross, 

 and George HomansEldridge. 1896. 4'-\ 556 pp. 31 pi.' Price $1.. 50. 



XXVIII. The JIarquette Iron-Bearing District of Michigan, with Atlas, by C. R. Van Hise ami 

 W. S. Bayley, including a Chapter on the Republic Trough, by 11. L. Smyth. 1895. 4'='. 608 pp. 35 

 pi. Price $5.75. 



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

 Hampden Counties, bv Benjamin Kendall l^merson. 1898. 4-. xxi, 790 pp. 35 pi. Price $1.90. 



XXX. Fossil Medusa-', by Charles Doolittle Walcott. 1898. 4^. ix, 201pp. 47 pi. Price $1.50. 

 In preparalion: 



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



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

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

 T. W. Stanton, and F. H. Knowlton. 



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

 Foerste. 



