. An introduction to the study of mammals living and extinct. Mammals. PECORA i:;(.Mierally be distinguished, inasmuch as the true molars of the Vervuhv ai'c more or less brachydont, and those of the BofiiJw generally hypsodont, the teeth of the former ha^'o comparatively short crowns (Fig. l'2'2), which, as in most mammals, take their place at once with the nock (or point ^vhore the crown and root join) on a level with or a little above the alveolar border, and remain in this position throughout the animal's life; whereas in the other forms(Fig. 1:23),the crown being lengthened and the r
. An introduction to the study of mammals living and extinct. Mammals. PECORA i:;(.Mierally be distinguished, inasmuch as the true molars of the Vervuhv ai'c more or less brachydont, and those of the BofiiJw generally hypsodont, the teeth of the former ha^'o comparatively short crowns (Fig. l'2'2), which, as in most mammals, take their place at once with the nock (or point ^vhore the crown and root join) on a level with or a little above the alveolar border, and remain in this position throughout the animal's life; whereas in the other forms(Fig. 1:23),the crown being lengthened and the root small, the nock does not come up to tiio alveolar level until a considerable part of the surface has worn away, and the crown of tlie tooth thus apjicars for the greater part of the animal's life partially buried in the socket. In this form of tooth (which is almost always most developed in the posterior molars of the permanent series) the constituent columns of the crown are necessarily nearly parallel, whereas. Fig. I'J^. —Crown sur- face of n -woni left upper molar of r(ihvomff! siva- It'iisi.^, to show bracliydout typo. (From the Pala-onlo- logia ])uUca.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Flower, William Henry, 1831-1899; Lydekker, Richard, 1849-1915. London, A. and C. Black
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Keywords: ., bookauthorly, bookcentury1800, bookdecade1890, booksubjectmammals
