Professor William H. Holmes and Dr. F. W. Hodge of the Smithsonian Institution, Washington, permitted the free use of contributed articles as well as figures published in the Smithsonian Reports and the _American Anthropologist_. The generous and hearty coöperation of all these individuals and institutions whose names are herewith appended is no small personal satisfaction to me. In addition to the names presented, there are more than three hundred persons who sent me photographs, drawings, or lengthy descriptions of the types in their several localities. LIST OF CONTRIBUTORS TO “THE STONE AGE” ADDIS, ALBERT L., Albion, Indiana. ALBEE, C., Red Rock, Montana. ARNOLD, B. W., Albany, N. Y. BAGG, HARRY W., New Berlin, N. Y. BAIRD, E. E., Poplar Bluff, Mo. BARR, JAMES A., Stockton, Cal. BARRETT, S. A., Milwaukee, Wis. BEAUCHAMP, W., Syracuse, N. Y. BRAUN, H. M., E. St. Louis, Ill. BROWN, C. E., Madison, Wis. Buffalo Society of Natural Sciences, Buffalo, N. Y. BURKETT, H. F., Findlay, Ohio. CALDWELL, F. M., Venice, Ill. COLLIE, G. L., Beloit, Wis. DEISHER, H. K., Kutztown, Pa. FRANCK, H. W., Sandwich, Ill. GRAVES, F. P., Doe Run, Mo. HAMILTON, H. P., Two Rivers, Wis. HAMPTON, GEORGE, Bridgeton, N. J. HILLS, L. W., Ft. Wayne, Ind. HODGE, F. W., Washington, D. C. HOLMES, W. H., Washington, D. C. HOLMES, W. A., Chicago, Ill. HULL, GEORGE Y., St. Joseph, Mo. Logan Museum, Beloit, Wis. MILLS, W. C., Columbus, Ohio. Milwaukee Public Museum, Milwaukee, Wis. Missouri Historical Society, St. Louis, Mo. MITCHELL, S. D., Ripon, Wis. MONTGOMERY, PROFESSOR HENRY, Toronto, Can. MOORE, C. B., Philadelphia, Pa. New York State Museum, Albany, N. Y. NORLAND, LUTHER A., La Jara, Colo. Ohio State Archæological and Historical Society, Columbus, Ohio. OWEN, DR. C. L., Chicago, Ill. PEABODY, CHARLES, Cambridge, Mass. PERKINS, G. H., Burlington, Vt. Records of the Past, Washington, D. C. REEDER, JOHN T., Houghton, Mich. STEINBRUECK, E. R., Mandan, N. Dakota. TOOKER, PAUL S., Westfield, N. J. VAN RENSSELAER, STEPHEN, Newark, N. J. WEBSTER, R. T., Rochester, N. Y. WEST, G. A., Milwaukee, Wis. WHELPLEY, H. M., St. Louis, Mo. WILLIAMS, PROFESSOR E. H., JR., Woodstock, Vt. WING, E. T. S., Portland, Maine. YOUNG, COL. B. H., Louisville, Ky. CONTENTS