In the summer of 1911 the boat was recalked and again launched when we continued our search from the point at which work closed the previous year. During the summer we were visited by the Museum's President, Prof. Henry Fairfield Osborn, and one of the Trustees, Mr. Madison Grant. A canoeing trip, one of great interest and pleasure, was taken with our visitors covering two hundred and fifty miles down the river from the town of Red Deer, during which valuable material was added to the collection and important geological data secured. As a result of the Canadian work the Museum is enriched by a magnificent collection of Cretaceous fossils some of which are new to science. FOOTNOTES: [Footnote 19: Transactions Kansas Academy of Science, p. 43.] [Footnote 20: From Fossil Wonders of the West. Century Magazine 1904, vol. lxviii, pp. 680-694. Reprinted by permission.] [Footnote 21: At this time the Union Pacific Railroad directly passed the bluffs; in the recent improvement of the grade the main line has been moved to the south.--H.F.O.] [Footnote 22: A different interpretation of this contraction is given upon p. 68.] REFERENCES. The published literature on this subject consists chiefly of technical descriptions and researches scattered through the files of numerous scientific journals in Europe and America. Only the more important titles are cited in this list. I have also listed the recently published text books which give the most authoritative treatment of the dinosaurs, and two or three popular books dealing with fossil vertebrates. Students consulting these authorities should remember that great additions to scientific knowledge of dinosaurs have been made during the last two decades, and much of the new evidence is as yet unpublished or undigested. The views and conclusions presented in this handbook are based upon the study of the American Museum collections as well as upon the authorities cited below. ABEL, OTHENIUS, 1912. _Palaeobiologie der Wirbelthiere._ Schweitzer-bart'sche Verlagsbuchh., Stuttgart. BRANCA U. JANENSCH, 1914. _Wissenschaftliche Ergebnisse der Tendaguru Expedition._ Archiv. f. Biontologie, iii Bd, i Heft. BROWN, BARNUM, 1902-1914. Articles in Bulletin of Amer. Mus. Nat. Hist., descriptive of new Cretaceous Dinosaurs. CHAMBERLIN & SALISBURY, 1905-7. _Geology_, vol. i-iii. (Henry Holt & Co. pub.) COPE, E.D., 1868-1895. Articles in Hayden Survey Reports, American Naturalist, Proceedings and Transactions of American Philosophical Society and elsewhere, descriptive of various new or little known dinosaurs. DOLLO, L., _Sauriens de Bernissart_, etc. Numerous articles chiefly in Bulletin Museum Royale Hist. Nat. Belg. GILMORE, C.W., 1914. _Osteology of the Armored Dinosauria in the U.S. National Museum with Special Reference to the Genus Stegosaurus._ U.S. National Museum, Bulletin No. 89, pp. 1-136, pll. i-xxxvii.