_Ornithomimus._ The skeleton of this animal from the Cretacic of Alberta was found by the Museum expedition of 1914. It is exceptionally complete, and has been mounted as a panel, in position as it lay in the rock, and with considerable parts of the original sandstone matrix still adherent. The long slender limbs, long neck, small head and toothless jaws are all singularly bird-like, and afford a striking contrast to the Tyrannosaurus. At the time of writing, its adaptation and relationships have not yet been thoroughly investigated. [Illustration: Fig. 19.--MOUNTED SKELETON OF BRONTOSAURUS IN THE AMERICAN MUSEUM.] FOOTNOTES: [Footnote 4: This is still doubtful in _Tyrannosaurus_. A number of very curious plates were found with one specimen in a quarry. B. Brown, 1913.] [Footnote 5: Quite recently a series of more or less complete skeletons have been secured from the upper Triassic (Keuper) near Halberstadt in Germany. They are not true Megalosaurians, but primitive types (Pachypodosauria) ancestral to both these and the Sauropoda. Probably many of the Connecticut footprints were made by animals of this primitive group. _Anchisaurus_ certainly belongs to it.] [Footnote 6: It is evidently "the dinosaur" of Sir Conan Doyle's "Lost World" but the vivid description which the great English novelist gives of its appearance and habits, based probably upon the Hawkins restoration, is not at all in accord with inferences from what is now known of these animals. See p. 44.] [Footnote 7: Allosaurus, a carnivorous Dinosaur, and its Prey. By W.D. Matthew. Am. Mus. Nat. Hist. Jour. Vol. viii, pp. 3-5, pl. 1.] [Footnote 8: The cost of preparation is now defrayed by the Museum.] [Footnote 9: Tyrannosaurus, Restoration and Model of the Skeleton. By Henry Fairfield Osborn. Bull. Amer. Mus. Nat. Hist., 1913, vol. xxxii, art. iv, pp. 91-92.] [Footnote 10: Since these lines were written the Museum has secured finely preserved skeletons of two or more kinds of Carnivorous Dinosaurs from the Belly River formation in Canada.] CHAPTER V. THE AMPHIBIOUS DINOSAURS, BRONTOSAURUS, DIPLODOCUS, ETC. SUB-ORDER OPISTHOCOELIA (CETIOSAURIA OR SAUROPODA). These were the Giant Reptiles par-excellence, for all of them were of enormous size, and some were by far the largest of all four-footed animals, exceeded in bulk only by the modern whales. In contrast to the carnivorous dinosaurs these are quadrupedal, with very small head, blunt teeth, long giraffe-like neck, elephantine body and limbs, long massive tail prolonged at the tip into a whip-lash as in the lizards. Like the elephant they have five short toes on each foot, probably buried in life in a large soft pad, but the inner digits bear large claws, blunt like those of turtles, one in the fore foot, three in the hind foot.