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Notes T HE PURPOSE of these notes is to direct the interested reader to sources of additional information about topics discussed by Bird, to clarify potentially confusing matters, and to indicate where new knowledge about fossils has led to different interpretations than those given by Brown or Bird. In no case should any criticism of their ideas be taken as indicative of disrespect for the men or their work. Our knowledge of prehistoric life is inherently incomplete; in the words of St. Paul, "We see through a glass darkly." If today's paleontologists see any less darkly than Bird and Brown did, it is only because we have more information about fossils available to us than they did-and this new knowledge rests on the foundations laid by earlier paleontologists like Brown and Bird. In preparing these notes and my introduction to Bird's memoirs, and in locating photographs for the book, I have been aided by many people: Hazel (Mrs. Roland T.) Bird, Peggy (Mrs. Junius) Bird, Mrs. Alice Bird Erickson, Dr. Wann Langston, Jr., Dr. John S. McIntosh, Dr. John H. Ostrom, Dr. Edwin H. Colbert, Dr. Philip D. Gingerich, Dr. Daniel C. Fisher, Mr. Ron L. Richards, Dr. Diane E. Beynon, Ms. Charlotte Holton, Dr. David Dilcher, Dr. Frances Brown, Mr. Walter Sorenson, Mr. Gregory S. Paul, Dr. Walter P. Coombs, Jr., Dr. Donald Baird, Dr. Dale A. Russell, Dr. Peter Dodson, and Mr. Chris Andress. Mr. Elmer Denman made usable copies of numerous old, yellowed photographs. During my work, I was supported by grants from the American Philosophical Society and the Office of Sponsored Research, Indiana UniversityPurdue University at Fort Wayne. Before proceeding to specific chapter notes, it may be helpful to list some sources ofinformation about general topics: General Information About Dinosaurs: A. Charig, 1979. A New Look at the Dinosaurs. Mayflower Books, New York. 208 E. H. Colbert, 1983. Dinosaurs: An Illustrated History. Hammond, Inc., Maplewood, New Jersey. A. J. Desmond, 1976. The Hot-Blooded Dinosaurs. Dial Press/James Wade, New York. D. F. Glut, 1982. The New Dinosaur Dictionary. Citadel Press, Secaucus, NewJersey. L. B. Halstead and J. Halstead, 1981. Dinosaurs. Blanford Press, Poole, Dorset, United Kingdom. D. Lambert, 1983. A Field Guide to Dinosaurs. Avon Books, New York. J. H. Ostrom, 1981. Dinosaurs. Carolina Biological Supply Company, Burlington, North Carolina. D. A. Russell, 1977. A Vanished World: The Dinosaurs of Western Canada. National Museums of Canada, Ottawa. W. Stout, 1981. The Dinosaurs: A Fantastic View ofa Lost Era. Bantam Books, New York. R. D. K. Thomas and E. C. Olson (editors), 1980. A Cold Look at the Warm-Blooded Dinosaurs. American Association for the Advancement of Science Selected Symposium 28. Westview Press, Boulder, Colorado. History of Study of Dinosaurs: E. H. Colbert, 1968. Men and Dinosaurs: The Search in Field and Laboratory. E. P. Dutton, New York. Reprinted by Dover Publications, New York, 1984, under the title: The Great Dinosaur Hunters and Their Discoveries. G. E. Lewis, 1964. Memorial to Barnum Brown (18731963 ). Geological Society of America Bulletin 75(2): PI9-P27ยท Stratigraphy and Earth History: R. H. Dott, Jr. and R. L. Batten, 1981. Evolution of the Earth. 3d ed. McGraw-Hill, New York. Chapter I I. For a beautifully illustrated recent account of the geology and paleontology of the Petrified Forest, see volume 51, number 4, 1979, of Plateau, the magazine of the Museum of Northern Arizona (Flagstaff, Arizona); the entire issue is devoted to this topic. Chapter 6 I. Barnum Brown named Bird's amphibian Stanocephalosaurus birdi (see 1933, A new genus of Stegocephalia from the Triassic of Arizona, American Museum Novitates 640, 1-4). In contrast to earlier (Paleozoic) amphibians, many of which had had terrestrial habits, Stanocephalosaurus and its relatives (technically known as stereospondyls) were specialized aquatic animals. Their bodies were rather flattened from top to bottom, their limbs rather weakly built, and their heads disproportionately large. Some of these animals were the largest amphibians that ever lived; a European form had a skull about four feet long. Although very successful in the early part of the Mesozoic, stereospondyls soon became extinct, to be survived by the amphibian lineages that ultimately gave rise to the modern frogs, toads, salamanders, and caecilians. Chapter 8 I. Brown published a description of the Howe Quarry work in the June, 1935 issue of Natural History (Sinclair Dinosaur Expedition, 1934, Natural History 36: 2- I 5). About 4000 dinosaur bones, representing at least 20 individual animals, were taken from this site. The...

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