II ADVERTISEMENT. 



IX. BracLiopotla and Lamellibrancbiata of the Raritaii Clavs and Greeusand Marls of New Jersey, 

 by Robert P. Whitfield. 1885. 4°. xx, 3:?8 pp. 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, a4:i pp. 56 1. 56 pi. Price $,2.70. 



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

 Cook Rnssell. lfc.85. 4°. xiv, 288 pp. 46 pi. and maps. Price .|1.75. 



XII. Geology and Mining Indu.stry of Leadvillo, Colorado, with atlas, by Samuel Kranklin Em- 

 mons. 1886. 4°. xxix, 770 pp. 45 pi. and atlas of 35 sheets folio. Price |i8.40. 



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 Fo.ssil Plants of the Triassic Rock.s of New Jersey and the Connecticut 

 Valley, by John S. Newberry. 1888. 4°. xiv, 152 pp. 26 pi. Price §1.0(1. 



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

 377 pp. 180 pi. Text and plates bound separately. Price, |3.25. 



In press: 



I. Lake Bonneville, by G. K. Gilbert. 



XVI. Paleozoic Fishes of North America, by J. S. Newberry. 

 In preparation: 



— Description of New Fossil Plants from the Dakota Group, by Leo Lesquereux. 



— Gasteropoda of the New Jersey Cretaceous and Eocene Marls, by R. P. Whittield. 



— Geology of the Eureka Mining District, Nevada, with atlas, by Arnold Hague. 



— Sauropoda, by 0. C. Marsh. 



— Stegosauria, by O. C. Marsh. 



— Brontotherid*, by O. C. Marsh. 



— The Penokee-Gogebic Iron- Bearing Series of North Wisconsin and Michigan, by Roland D. Irving. 



■ — Report on the Denver Coal Basin, by S. F. Emmons. 



— Report on Silver Clill'and Teu-Mile Mining District, Colorado, by S. F. Emmons. 



— Flora of the Dakota Group, by J. S. Newberry. 



— The Glacial Lake Agassiz, by Warren Upliam. 



— Geology of the Potomac Formation in Virginia, by W. M. Fontaine. 



BULLETINS. 



Each of the Bulletins is complete in itself, but in order that they may be bonnd in volumes of 

 convenient size, each Bulletin has two paginations, one proper to itself and another which belongs to it 

 aspart of the volume. Numbers 1 to 6 form Volume I; Numbers 7 to 14, Volume II; Numbers 15 to 23, 

 Volume HI; Numbers 24 to 30, Volume IV; Numbers 31 to 36, Volume V; Numbers 37 to 41, Volume 

 VI; Numbers 42 to 46, Volume VII; Numbers 47 to 54, Volume VHI. 



1. On Hyperstheue-Andesite and on Triclinic Pyroxene in Augitic Rocks, by Whitman Croffs, with 

 a Geological Sketch of Buffalo Peaks, Colorado, by S. F. Emmons. 1883. 8". 42 pp. 2 pi. Price 10 

 cents. 



2. Gold and Silver Conversion Tables, giving the coining values of troy ounces of fine metal, etc., 

 computed by Albert Williams, jr. 1883. 8°. 8 pp. Price 5 cents. 



3. On the Fossil Faunas of the Upper Devonian, along the meridian of 76^ 30', from Tompkins 

 County, N. Y., to Bradford County, Pa., by Henry S. Williams. 1884. 6^. 36 pp. Price 5 cents. 



4. On Mesozoic Fossils, by Charles A. White. 1884. 8". 36 pp. 9 pi. Price 5 cents. 



5. A Dictionary of Altitudes in the United States, compiled by Henry Gannett. 1884. 8*^. 325 pp. 

 Price 20 cents. 



6. Elevations in the Dominion of Canada, by J. W. Spencer. 1884. 8°. 43 pp. Price 5 cents. 



7. Mapoteca Geologica Americana. A Catalogue of Geological Maps of America ( North and Sont li ), 

 17.52-1881, in geographic and chronologic order, by Jules Marcon and John Belknap Marcou. 1884. 

 8°. 184 pp. Price 10 cents. 



8. On Secondary Enlargements of Mineral Fragments in Certain Rocks, by R. D. Irving and C. R. 

 Van Hise. 1884. 8". 56 pp. 6 pi. Price 10 cents. 



9. A Report of -work done in the Washington Laboratory during the fiscal year 1883-'84. F. W. 

 Clarke, chief chemist; T. M. Chatard, assistant chemist. 1884. 8°. 40 pp. Price 5 cents. 



10. On the Cambrian Faunas of North America. Preliminary studies, by Charles Doolittle Wal- 

 cott. 1884. 8°. 74 pp. 10 pi. Price 5 cents. 



11. On the Quaternary and Recent Mollusca of the Great Basin ; with Descriptions of New Forms, 

 by R. Ellsworth Call. Introduced by a sketch of the Quaternary Lakes of the Great Basin, bv G. K. 

 Gilbert. 1884. 8". 60 pp. 6 pi. Price 5 cents. 



12. A Crystallographic Study of the Thinolite of Lake Lahontan, by Edward S. Dana. 1884. 8°. 

 34 pp. 3 pi. Price 5 cents. 



13. Boundaries of the United States and of the several States and Territories, with a Historical 

 Sketch of the Territorial Changes, by Henry Gannett. 1885. H'^. 135 pp. Price 10 cents. 



14. The Electrical and Magnetic Properties of the Iron-Carburets, by Carl Barns and Vincent 

 Strouhal. 1885. 8°. 238 pp. Price 15 cents. 



15. On the Mesozoic and Ceuozoic Paleontology of California, by Charles A. White. 1885. 8°. 

 33 pp. Price 5 cents. 



16. On the Higher Devonian FannasofOntario County, New York, bv John M.Clarke. 1885. 8°. 

 86 pp. 3 pi. Price 5 cents. 



