II MONOGRAPHS. 



XXII. A manual of topographic mi^tliods, by Heury Gannett, chief topographer. 1898. i"^. 

 xiv, 300 pp., 18 pis. Price, $1.00. 



XXIII. Geology of the Green Mountains in Massachusetts, by Raphael Pnmpelly, T. Nelson Dale, 

 and J. E. WolC 1894. 4*^. xiv, 206 pp., 23 pis. Price, $1.30. 



XXIV. Mollusca and Criistacea of the Miocene formations of New .Jersey, by Robert Parr 

 Whitfield. 1894. 4'^. 193 pp., 24 pis. Price, 90 cents. 



XXV. The Glacial Lake Agassiz, by Warren Upham. 1895. 4'^. xxiv, 658 pp., 38pls. Price, $1.70. 



XXVI. Flora of the Auiboy clays, by .John Strong Newberry; a p sthnmons work, edited by 

 Arthur Hollick. 1895. 4'^. 260 pp., 58 pis. Price, $1.00. 



XXVII. Geology of the Denver Basin in Colorado, by Samuel Franklin Emmons, Whitman Cross, 

 and George Homans EUlridge. 1896. 4^. 556 pp., 31 pis. Price, $1.50. 



XXVIII. The Marquette iron-bearing di. strict of Michigan, with atlas, by C. R. Van Hise and 

 W. S. Bayley, including a chapter on the Republic trough, by H. L. Smyth. 1895. 4'^. 608 pp., 35 

 pis., and atlas of 39 sheets folio. Price, $5.75. 



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

 Hampden counties, by Benjamin Kendall Emerson. 1898. 4^. xxi, 790 pp., 35 pis. Price, $1.90. 



XXX. Fossil ineduisa'., by Charles Doolittle Waleott. 1898. 4^. ix, 201pp., 47 pis. Price, $1.50. 



XXXI. Geology of the Aspen mining district, Colorado, with atlas, by .Josiah Edward Spurr. 

 1898. 4^^. XXXV, 260 pp., 43 pis., and atlas of 30 sheets folio. Price, $3.60. 



XXXII. Geolugy of the Yellowstone National Park, Part II, Descriptive geology, petrography, 

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

 T. W. Stanton, and F. H. Knowlton. 1899. 4^'. xvii, 893 pp., 121 pis. Price, $2.45. 



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

 Foerstu. 1899. 4". xx, 402 pp., 31 pis. Price, $1.00. 



XXXIV. The iflacial gravels of Maine and their associated deposits, by George H. Stone. 1899. 

 4^'. xiii, 499 pp., 52 pis. Price, $1.30. 



XXXV. The later extinct flora.s of North America, by ,John Strong Newberry; edited by 

 Arthur Hollick. 1898. 4'-. xviii, 295 pp., 68 pis. Price, $1.25. 



XXXVI. The Crystal Falls iron-bearing district of Michigan, by ,J. Morgan Clements and 

 Henry Lloyd Smyth; with a chapter on the Sturgeon River tongue, by William Shirley Bayley, and an 

 introduction by Charles Richard Van Hise. 1899. 4*^. xxxvi, 512 pp., 53 pis. Price, $2.00. 



XXXVII. Fossil flora of the Lower Coal Measures of Missouri, by David White. 1899. 4°. 

 xi, 467 pp., 73 pis. Price, $1.25. 



XXXVni. The Illinois glacial lobe, by Frank Leverett. 1899. 4'^. xxi, 817 pp., 24 pis. 

 Price, $1.60. 



XXXIX. The Eocene and Lower Oligocene coral faunas of the United States, with descriptious 

 of afew doubtfully Cretaceou8species,byT.Wayland Vaughan. 1900. 4^. 263 pp., 24 pis. Price,$1.10. 



XL. Adephagous aiid clavicorn Coleoptera froui the Tertiary deposits at Florissant, Colo- 

 rado, with descriptions of a few other forms and a systematic list of the non-rhynchophorons 

 Tertiary Coleoptera of North America, by Samuel Hubbard Scudder. 1900. 4^. 148 pp., 11 pis. 

 Price, 80 cents 



XLI. Glacial formations and drainage features of the Erie and Ohio basins, by Frank Leverett. 

 1902. 4'='. 802 pp., 26 pis. Price, $1.75. 

 In preparation: 



— Flora of the Laramie and allied formations, by Frank Hall Knowlton. 



