n ADVERTISEMENT. 
VII. Silver-Lead Deposits of Eureka, Nevada, by Joseph Story Curtis. 1884. 4°. xiii, 200 pp. 16 
pi. Price $1.20. 
VIII. Paleontology of the Eureka District, by Charles Doolittle Walcott. 1884. 4°. xiii, 298 pp. 
241. 24 pi. Price $1.10. 
IX. Brachiopoda and Lam ellibranchiata of the Rari tan 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 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, 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 Val- 
ley, by John S. Newberry. 1888. 4°. xiv, 152 pp. 26 pi. 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 $3.25. 
In press: 
XVI. Paleozoic Fishes of North America, by J. S. Newberry. 
I. Lake Bonneville, by G. K. Gilbert. 
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. Whitfield. 
— Geology of the Eureka Mining District, Nevada, with atlas, by Arnold Hague. 
— Sauropoda, by O. C. Marsh. 
— Stegosauria, by O. C. Marsh. 
— Brontotheridae, 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 Cliff and Ten-Mile Mining Districts, Colorado, by S. F. Emmons. 
— Flora of the Dakota Group, by J. S. Newberry. 
— The Glacial Lake Agassiz, by Warren Upham. 
— Geology of the Potomac Formation in Virginia, by W. M. Fontaine. 
BULLETINS. 
1. On Hypersthene-Andosito and on Triclinic Pyroxene in Augitic Rocks, by Whitman Cross, 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 vaiues of troy ounces of fine metal, etc., com- 
puted 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. 8°. 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 South), 
1752-1881, in geographic and chronologic order, by Jules Marcou and John Belknap Marcou. 188«. 
8°. 184 pp. Price 10 cents. 
8. On Secondary Enlargements of Mineral Fragments in Certain Rocks, by R. D. Irving and C. R. 
VanHise. 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 Walcott. 
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, by G. K. 
Gilbert. 1884. 8°. 66 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. 8°. 135 pp. Price 10 cents. 
14. The Electrical and Magnetic Properties of the Iron-Carburets, by Carl Barus and Vincent 
Strouhal. 1885. 8°. 238 pp. Price 15 cents. 
15. On the Mesozoic aud Cenozoic Paleontology of California, by Charles A. White. 1885 8°. 
33 pp. Price 5 cents. 
