Licence: Public Domain Mark
Credit: A manual of dental anatomy : human and comparative / by Charles S. Tomes. Source: Wellcome Collection.
Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.
19/614 (page 5)
![papillre, in which the stratum corneum is abundant and hard, squeezed together to form a coherent mass. These horny teeth do the work of mastication during the greater part ot the animal's hfe, but when the creature was half grown, it possessed true teeth with multi-cuspid grinding surfaces and short stunted roots. At that period the horny plates were not fully formed, but they were situated underneath the true teeth, for which they formed a bed, and were incomjslete Fig. 1 ('). only where the roots of the teeth passed tlirougli them. When the teeth were shed they became complete, and the ])cculiar sculpturing of their surfaces is due to their having once formed a bed for the short-rooted molars. But tliey are obviously not in any way homologous with true teeth. The horny teeth which surround the sucking iiiouth of the lamprey arc found to ccmsist of one or more suiierimposed (') Tontli of Myxine. f/. Dentine cap. c. linaincl (?). he. Um u form- ing epitiieiiiim. Pulp.](https://iiif.wellcomecollection.org/image/b21932025_0019.jp2/full/800%2C/0/default.jpg)
