Fig. 3. Fragment of the fossil horn of some species of Cervus or Deer, from Etampes, in France. Fig. 4. Two teeth of a ruminant, (a species of _Bos_ or _Ox_,) in breccia, from Gibraltar.[72] [Footnote 72: Wonders of Geology, vol. i. p. 186.] The remaining figures. Figs. 5, 6, 7, 8, represent the worn surfaces of molars or grinding teeth of the extinct species of Elephants termed Mammoths, (_Elephas primigenius_, of M. Bojanus.) Fig. 9, shows the structure of part of the tooth. These were regarded by Mr. Parkinson as referable to two or more species of Mammoth; but Professor Owen, after an examination of the vast number of specimens that modern researches have brought to light, and which are deposited in the public and private collections of Great Britain, concludes that the specimens here figured belong to but one species. The differences observable in the surface of the crowns, are due to abrasion, and to the latitude of variety to which the highly complex molars of this extinct Elephant were subject.[73] [Footnote 73: British Association, Report for 1843. Fossil Mammalia, p. 213.] For an account of the Mastodon and Mammoth, see Wonders of Geology, vol. i. pp. 151-161. [Illustration: Plate LXXII.] PLATE LXXII. Fossil Teeth of Mammalia. Fig. 1. A right lower molar tooth of an extinct species of Hippopotamus (_H. major_, of Cuvier), from France. Fig. 2. Upper molar of an extinct species of Rhinoceros (_R. leptorhinus_, of Cuvier), from the bone-cave near Torquay, Devonshire. Fig. 3. The crown of a molar tooth of the "gigantic Tapir" of Baron Cuvier; the _Dinotherium_ of M. Kaup.[74] [Footnote 74: Wonders of Geology, vol. i. p. 174.] Fig. 4, "the outer, and fig. 5, the inner, surface of the fourth molar of _Palæotherium medium_, of M. Cuvier."--_Mr. Parkinson._ From the eocene tertiary deposits of Paris. Fig. 6, the outer, and fig. 7, the inner, aspect of an upper molar of the same animal. Figs. 8, & 9. Lower molars of _Amplotherium commune_, of M. Cuvier.[75] [Footnote 75: Ibid, p, 256.] Fig. 10. An ungueal or bone of the claw, of a gigantic animal of the Sloth tribe (_Megalonyx Jeffersoni_); the figure is half the linear diameter of the original.[76] [Footnote 76: Ibid. p. 169.] Fig. 11. Vertical section of a tooth of the same. These remains of a colossal animal of that remarkable group of mammalia--the Edentata--are from Big-bone Cave, in Kentucky. The Megalonyx resembled the Megatherium in its general characters but was one-third smaller. See _Supplementary Notes_, p. 184. [Illustration: Plate LXXIII.] PLATE LXXIII. Megatherium and Fossil Bears.