Hand-book of dental anatomy and surgery for the use of students and practitioners / by John Smith.

  • Smith, John.
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Hand-book of dental anatomy and surgery for the use of students and practitioners / by John Smith. Source: Wellcome Collection.

Provider: This material has been provided by the University of Toronto, Harry A Abbott Dentistry Library, through the Medical Heritage Library. The original may be consulted at the Harry A Abbott Dentistry Library, University of Toronto.

    20/152 (page 8)
    situated in the front of its mouth, and its no less powerful crushing ones behind; and the sharks, with their remarkable dental system, composed of tier upon tier, all round the jaws, of flat triangular teeth, compressed cones, in fact, an arrangement perfectly adapted to the savage nature and voracious habits of these creatures. The next class of animals 'higher than the fishes is that of the reptiles, and among them we find some remarkable forms of teeth, consti- tuting still, however, only further developments of the cone. This class of animals is more pro- perly divided into two, namely, Batrachia and Eeptilia ; here, however, both are included under the name of reptiles. Some of these animals, such as turtles and tortoises, have no teeth, but merely a horny covering extended over the jaws; others, like frogs, have only upper teeth; while others, again, such as some serpents, have teeth not only in both jaws, but also situated upon the palate. Among the various examples of reptilian teeth, crocodiles and serpents present some points of greater interest in their dental apparatus. The number of teeth in the crocodile seems to re-