II ADVERTISEMENT. 
B 31. Systematic review of our present knowledgeof fossil insects, including myriapodsand arachnids, 
by S. H. Scudder. 1886. 128 pp. 
B 34. Relation of the Laramie molluscan fauna to that of the succeeding fresh-water Eocene and 
other groups, by C. A. White. 1886. 54 pp., 5 pis. 
B 37. Types of the Laramie flora, by L. F. Ward. 1887. 354 pp., 57 pis. 
B 41. Fossil faunas of the Upper Devonian— the Genesee section, New York, by H. S. Williams. 1887. 
121pp., 4 pis. (Out of stock.) 
B 43. Tertiary and Cretaceous strata of the Tuscaloosa, Tombigbee, and Alabama rivers, by E. A 
Smith and L. C. Johnson. 1887. 189 pp., 21 pis. 
B 51. Invertebrate fossils from the Pacific coast, by C. A. White. 1889. 102 pp., 14 pis. (Out of stock.) 
B 56. Fossil wood and lignite of the Potomac formation, by F. H. Knowlton. 1889. 72 pp., 7 pis. 
B 63. Bibliography of Paleozoi< Crustacea from 1698 to 1889, including a list of North American 
species, and a systematic arrangement of genera, by A. W. Vogdes. 1890. 177 pp. 
B 69. Classed and annotated bibliography of fossil insects, by S. H. Scudder. 1890. 101 pp. 
B 71. Index to known fossil insects of the world, including myriapods and arachnids, by S. H. 
Scudder. 1891. 714 pp. 
B 77. The Texan Permian and its Mesozoic types of fossils, by C. A. White. 1891. 51 pp., 4 pis. 
B 80. Correlation papers— Devonian and Carboniferous, by II. S. Williams. 1891. 279pp. (Out of 
stock.) 
B 81. Correlation papers— Cambrian, by C. D. Walcott. 1891. 447 pp., 3 pis. (Out of stock.) 
B 82. Correlation papers— Cretaceous, by C. A. White. 1891. 273 pp., 3 pis. (Outof stock.) 
B 83. Correlation papers— Eocene, by W. B. Clark. 1891. 173 pp., 2 pis. 
B 84. Correlation papers— Neocene, by W. II. Dall and (i. D. Harris. 1892. 349 pp., 3 pis. (Out of 
stock.) 
B 85. Correlation papers— The Newark system, by I. C. Russell. 1892. 344 pp., 13 pis. (Out of stock.) 
B 86. Correlation papers— Archean and Algonkian, by C. K. Van Ilise. 1892. 549 pp., 12 pis. (Out 
of stock.) 
B 87. Synopsis of American fossil Brachiopoda, including bibliography and synonymy, by Charles 
Schuchert. 1897. 464 pp. 
B 88. Cretaceous Foraminifera of New Jersey, by K. M. Bagg, jr. 1898. 89 pp., 6 pis. 
B 93. Some insects of special interest from Florissant, Colo., and other points in the Tertiaries of 
Colorado and I'tah, by S. H. Scudder. 1892. 35pp., 3 pis. (Out of stock.) 
B 97. Mesozoic Echinodermata of the United States, by W. B. Clark. 1893. 207 pp., 50 pis. 
B 98. Flora of the outlying Carboniferous basins of southwestern Missouri, by David White. 1893. 
139 pp., 5 pis, 
B 101. Insect fauna of the Rhode Island coal field, by S. II. Scudder. 1893. 27 pp., 2 pis. 
B 102. Catalogue and bibliography of North American Mesozoic Invertebrata, by C. B. Boyle. 1893. 
315 pp. 
B 105. The Laramie and the overlying Livingston formation in Montana, by W. H.VYeed, with report 
on flora, by F. H. Knowlton. 1893. 68 pp., 6 pis. 
B 106. Colorado formation and its invertebrate fauna, by T. W. Stanton. 1893. 288 pp., 45 pis. (Out 
of stock.) 
B 110. Paleozoic section in the vicinity of Three Forks, Mont., by A. C. Peale. 1893. 56 pp., 6 pis. 
B 120. Devonian system of eastern Pennsylvania and New York, by C. S. Prosser. 1895. 81 pp., 2 pis. 
(Outof stock.) 
B 121. Bibliography of North American paleontology, by C. R. Keyes. 1894. 251 pp. 
B 124. Revision of North American fossil cockroaches, by S. H. Scudder. 1895. 176 pp., 12 pis. 
B 128. Bear River formation and its characteristic fauna, by C. A. White. 1895. 108 pp., 11 pis. 
B 133. Contributions to the Cretaceous paleontology of the Pacific coast: The fauna of the Knoxville 
beds, by T. W. Stanton. 1895. 132 pp., 20 pis. 
B 134. Cambrian rocks of Pennsylvania, by C. D. Walcott. 1896. 43 pp., 15 pis. 
B 141. Eocene deposits of the Middle Atlantic slope in Delaware, Maryland, and Virginia, by W. B. 
Clark. 1896. 167 pp., 40 pis. 
B 142. Brief contribution to the geology and paleontology of northwestern Louisiana, by T. W. 
Vaughan. 1896. 65 pp., 4 pis. 
B 145. Potomac formation in Virginia, by W. M. Fontaine. 1896. 149 pp., 2 pis. 
B 151. Lower Cretaceous gryphseas of the Texas region, by R. T. Hill and T. W. Vaughan. 1898. 139 
pp., 35 pis. 
B 152. Catalogue of Cretaceous and Tertiary plants of North America, by F. H. Knowlton. 1898. 
247 pp. 
B 153. Bibliographic index of North American Carboniferous invertebrates, by Stuart Weller. 1898. 
653 pp. 
B 163. Flora of the Montana formation, by F. II. Knowlton. 1900. 118 pp., 19 pis. 
B 173. Synopsis of American fossil Bryozoa, including bibliography and synonymy, by .1. M. Nickles 
and R. S. Bassler. 1900. 663 pp. 
B 179. Bibliography and catalogue of fossil Vertebrata of North America, by O. P. Hay. 1902. 868 pp. 
B 191. North American geologic formation names: Bibliography, synonymy, and distribution, by F. B. 
Weeks. 1902. 448 pp. 
