II ADVERTISEMENT. 



V. The Copper-Bearing Rocks of Lake Superior, by Rolanil Duer Irving. 1883. 4. xvi,464pp. 

 I'll. 29 pi. and maps. Pricefl.85. 



VI. Contributions to the Knowledge of the Older Mesozoic Flora of Virginia, by William Morris 

 Fontaine. 188.3. 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, 200 pp. 

 16 pi. Price $1.20. 



VIII. Paleontology of the Eureka District, by Charles Doolittle Walcott. 1884. 4. xiii,29S pp. 

 241. 24 pi. Price $1.10. 



IX. Brachiopoda and Lamellibrancbiata of the Raritan Clavs and Greensand Marls of New Jersey, 

 by Robert P. Whittield. 1885. 4. xx, 338 pp. 35 pi. 1 map. Price 81. 15. 



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

 Marsh. 1886. 4. xviii, 243pp. 561. 56 pi. Price $2.70. 



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

 Cook Russell. 1&85. 4. xiv, 288 pp. 46 pi. and maps. Price $1.75. 



XII. Geology and Mining Industry of Leadville, Colorado, with atlas, by Samuel Franklin Em- 

 inons. 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 Triassie Rocks of New Jersey and the Connecticut 

 Valley, by John S. Newberry. 1888. 4. xiv, 152 pp. 2(5 pi. Price $1.0H. 



XV. The Potomac or Younger Mesozoic 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. 400pp. 66 pi. Price$t.lO. 



XVIII. Gasteropoda and Cephalopoda of the Raritan Clays and Greensand Marls of New Jersey, 

 by Robert P. Whittield. 1891. 4. 402 pp. 50 pi. Price $1.00. 



XX. Geology of the Eureka District, Nevada, with an atlas, by Arnold Hague. 1892. 4. xvii, 

 419 pp. 8 pi. Price $5.25. 



In press : 



XIX. The Penokee Iron-Bearing Series of Northern Wisconsin and Michigan, by Roland D. 

 Irving and C. R. Van Hise. 



XXI. The Tertiary Rhynchophorous Coleoptera of North America, by S. H. Scudder. 



XXII. Geology of the Green Mountains in Massachusetts, by Messrs. Punipelly, Wolff, and Dale. 



In preparation : 



Mollusca and Crustacea of the Miocene Formations of New Jersey, by R. P. Whitfleld. 



Sauropoda, by O. C. Marsh. 



Stegosauria, by O. C. Marsh. 



Brontotheridae, by O. C. Marsh. 



Report on the Denver Coal Basin, by S. F. Eminons. 



Report on Silver Cliff and Ten-Mile Mining Districts, Colorado, by S. F. Eiumons. 



The Glacial Lake Agassiz, by Warren Upham. 



BULLETINS. 



1. On Hypersthene-Andcsite and on Triclinic Pyroxene in Augitic Rocks, by Whitman Cross, with 

 a Geological Sketch of Buffalo Peaks, Colorado, by S. F. Einmons. 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. 8. 36pp. Price 5 ceuts. 



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. 325pp. 

 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. 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. 40pp. 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, by G. K. 

 G'ilbert. 1884. 8. 66 pp. 6 pi. Price 5 cents. 



