Volume 2

Odontography, or a treatise on the comparative anatomy of the teeth, their physiological relations, mode of development and microscopic structure, in the vertebrate animals / by Richard Owen.

  • Owen, Richard, 1804-1892.
Date:
1840
Catalogue details

Licence: Public Domain Mark

Credit: Odontography, or a treatise on the comparative anatomy of the teeth, their physiological relations, mode of development and microscopic structure, in the vertebrate animals / by Richard Owen. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    losaurus Bucklandi: a, successional teeth b, outer alveolar wall; c, transverse par- titions. Fig. 9. Edge-view of a tooth, with portion of jaw, of the Megalosaurus. Fig. 10. Side view of the same tooth, with dotted outline of pulp-cavity. Fig. 11. Transverse section of ditto. Buckland. PLATE 70. M. Fig. 1.—Nat. size, of Fig. 2, part of a transverse section of the tooth of the Megalosaurus, magnified 250 diameters. Fig. 3. A peripheral portion of the same, magnified 500 linear diameters: a, dentine; b, boundary cells between the dentine and c, the enamel. Original. PLATE 71. Outline of a transverse section of the tooth of the Iguanodon, and a magnified view of the moiety including the pulp cavity a ; b, the vaso-dentine ; c, stratum of minute cellules. The opposite part of the section is composed of hard unvascular dentine. Original. PLATE 72. Fig. 1.—A portion of jaw, with two teeth, of the Leiodon anceps: a, crown; a\ anchylosed base; b, fractured base of crown. I1 Transverse section of crown. Fig. 2. Fractured anchylosed base of the same. Fig. 3. Crown of the tooth of the Polyptychodon continuvs. Fig. 4. Front and back views of the crown of a tooth of the Polyptychodon interruptus. 4* Out- line of transverse section of same tooth. Fig. 5. Outline of transverse section of the tooth of the Pliosaurus. Original. PLATE 73. Fig. 1.—A tooth of Ichthyosaurus inter - medius. Fig. 2. A tooth of Ichth. lon- cliiodon, with a transverse section of the grooved base below. Fig. 3. A tooth of Ichth. platyodon, viewed edge-wise with an outline of the transverse section of the crown. Fig. 4. A tooth of Ichth. communis, with an outline of the transverse section of the crown. Fig. 5. A tooth of Ichth. tenui- rostris. Fig. 6. A tooth of the Ichth. platyo- don, showing the cavity a, produced by the pressure of a new tooth. Fig. 7. A sec- tion through the tooth and lower jaw of the Ichth. communis, showing the young tooth, c, which has penetrated into the cavity formed by progressive absorption in the fang or base of the old tooth, a, remnant of the pulp-cavity ; b, consoli- dated base; d, is a section of the dental canal. Fig. 8. Section of a tooth of the Ichth. communis showing a, remains of the pulp-cavity in the crown, filled by spar; b, ossified base. Fig. 9. Portion of alveolar groove with indications of septa. Fig. 10. Tooth of the Plesio- saurus macrocephalus. Original. PLATE 73 A. Fig. 1.—Longitudinal section of the crown of the tooth of the Ichthyosaurus inter- medius, magnified 250 linear diameters. Fig. 2. A peripheral portion of the same section, magnified 400 linear diameters : a, dentine ; b. enamel, nat. size. Original. PLATE 74. Fig. 1.—Longitudinal section of the apex of the crown of the tooth of the Plesio- saurus Hawkinsii, magnified 250 linear diameters. Fig. 2. A peripheral portion of the same section, magnified 700 linear diameters. Original, PLATE 75. Fig. 1.—A tooth of the Crocodilus bipor- catus, with the size and form of the b 2