II ADVERTISEMENT. 
MONOGRAPHS. 
I. Lake Bonneville, by Grove Karl Gilbert. 1890, 4°. xx,4388 pp. 5lpl. 1map. Price $1.50. 
Il. Tertiary History of the Grand Canon District, with atlas, by Clarence E. Dutton, Capt., U.S. A. 
1882. 4°. xiv, 264 pp. 42 pl. and atlas of 24 sheets folio. Price $10.00. 
III. Geology of the Comstock Lode and the Washoe District, with atlas, by George I. Becker. 
1882. 4°. xv,422 pp. 7 pl. and atlas of 21 sheets folio. Price $11.00. 
IV. Comstock Mining and Miners, by Eliot Lord. 1883. 4°. xiv, 451 pp. 3 pl. Price $1.50. 
V. The Copper-Bearing Rocks of Lake Superior, by Roland Duer Irving. 1883. 4°. xvi, 464 
pp. 14]. 29 pl. 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. 541. 54 pl. Price $1.05. 
VII. Silver-Lead Deposits of Eureka, Nevada, by Joseph Story Curtis. 1884. 4°. xiii, 200 pp. 
16 pl. Price $1.20: 
: VIII. Paleontology of the Eureka District, by Charles Doolittle Walcott. 1884. 4°. xiii, 298 
pp. 241. 24 pl. 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 pl. Imap. Price $1.15. 
X. Dinocerata. A Monograph of an Extinet Order of Gigantic Mammals, by Othniel Charles 
Marsh. 1886. 4°. xviii, 243 pp. 561. 56 pl. Price $2.70. 
XI. Geological History of Lake Lahontan, a Quaternary Lake of Northwestern Neyada, by 
Israel Cook Russell. 1885. 4°. xiv, 288 pp. 46 pl. and maps. Price $1.75. 
XII. Geology and Mining Industry of Leadville, Colorado, with atlas, by Samuel Franklin Em- 
mons. 1886. 4°. xxix, 770 pp. 45 pl. and atlas of 35 sheets folio. Price $8. 40. 
XIII. Geology of the Quicksilver Deposits of the Pacitie Slope, with atlas, by George FP. Becker. 
1888. 4°, xix, 486 pp. 7 pl. and atlas of 14 sheets folio. Price $2.00. 
XIV. Fossil Fishes Onl Fossil Plants of the Triassic Rocks of New Jersey and the Connecient 
Valley, by John 8S. Newberry. 1888. 4°. xiv, 152 pp. 26 pl. Price $1.00. 
XY. The Potomac or Younger Mesozoic Flora, by William Morris Fontaine, 1889, 4°, xiv, 
377 pp. 180 pl. Text and plates bound separately. Price $2.50. 
XVI. The Paleozoic Fishes of North America, by John Strong Newberry. 1889. 4°. 340 pp. 
53 pl. Price $1.00. 
XVI. The Flora of the Dakota Group, a posthumous work, by Leo Lesquereux. Edited by F. 
H. Knowlton, 1891, 4°. 400 pp. 66 pl. Price $1.10. 
XVII. Gasteropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey, 
by Robert P. Whitfield. 1891. 4°. 402 pp. 50pl. Price $1.00. 
XIX. The Penokee Ivon-Bearing Series of Northern Wisconsin and Michigan, by Roland D. 
Irving and GC. R. Van Ilise. 1892. 4°. xix,534 pp. Price $1.70. 
XX. Geology of the Eureka District, Nevada, with an atlas, by Arnold Hague. 1892, 4°. xvii, 
419 pp. 8pl. Price $5.25. 
XXI. The Tertiary Rhynechophorous Coleoptera of the United States, by Samuel Hubbard Seud- 
der. 1893. 4°, xi, 206pp. 12 pl. Price 90 cents. 
XXII. A Manual of Topographic Methods, by Henry Gannett, chief topographer. 1893, 4°, 
tv, 300 pp. 18 pl. Price $1.00. 
XXIII. Geology of the Green Mountains in Massachusetts, by Raphael Pumpelly, T. Nelson Dale, 
and J. E. Wolff. 1894. 4°. xiv, 206pp. 23 pl. Price $1.30. 
XXIV. Mollusea and Crustacea of the Miocene Formations of New Jersey, by Robert Parr Whit- 
field. 1894. 4°. 193 pp. 24 pl. Price 90 ceats. 
XXV. The Glacial Lake Agassiz, by Warren Upham. 1895. 4°. xxiv, 658 pp. 38 pl. Price $1.70. 
XXVI. Flora of the Amboy Clays, by John Strong Newberry; a posthumous work, edited by 
Arthur Hollick. 1895. 4°. 260 pp. S58 pl. Price $1.00. 
In preparation: 
—The Geology of Franklin, Hampshire, and Hampden counties, Massachusetts, by Benjamin 
Kendall Emerson. 
—The Glacial Gravels of Maine and their associated deposits, by George H. Stone. 
—Geology of the Denver Basin, Colorado, by S. F. Emmons, Whitman Cross, and Geo, H. Eldridge. 
—Sauropoda, by O. C. Marsh. 
—Stegosauria, by O. C, Marsh. 
—Brontotheridie , by O. C. Marsh. 
—Report on Silve r Cliff and Ten-Mile Mining Districts, Colorado, by 8. I’. Emmons, 
BULLETINS. of 
1. On Hypersthene-Andesite and on Triclinie Pyroxene in Augitic Rocks, by Whitman Cross, 
with a Geological Sketch of Buffalo Peaks, Colorado, by 8. F. Emmons, 1883, 8°. 42 pp. 2 pl. 
Price 10 cents. 
2. Gold and Silver Conversion Tables, giving the coining values of troy ounces of fine metal, ete., 
computed by Albert Williams, jr. 1883. 8 . 8pp. 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°. 386 pp. Price 5 cents. 
: On Mesozoic Possils, by Charles A. White. 1884. 8°. 386 pp. 9 pl. Price 5 cents. 
. A Dictionary of Altitudes in the United States, compiled by Henry Gannett. 1884, 8°. 325 
pp- Py rice 20 cents, 
