. Zoology : for students and general readers . Zoology. THE EAR OF MAMMALS. 563 In the elephant the upper canines form the tusks, the cor- responding teeth of the lower jaw being absent. In many teeth, as those of the deer (Fig. 490), the crown of the molars is. quite convex, with crescent-shaped enamel areas. The canines are large and sabre-shaped in the cat fam- ily, while in the pigs, especially the baby- roussa of Malaysia, the upper pair curve upward and backward to the forehead. The premolars and molars have two or three roots or fangs ; in none of the lower vertebrates do the teeth have
. Zoology : for students and general readers . Zoology. THE EAR OF MAMMALS. 563 In the elephant the upper canines form the tusks, the cor- responding teeth of the lower jaw being absent. In many teeth, as those of the deer (Fig. 490), the crown of the molars is. quite convex, with crescent-shaped enamel areas. The canines are large and sabre-shaped in the cat fam- ily, while in the pigs, especially the baby- roussa of Malaysia, the upper pair curve upward and backward to the forehead. The premolars and molars have two or three roots or fangs ; in none of the lower vertebrates do the teeth have more than one root. The organs of sense are much developed, especially the ear. The quadrate bone of the reptiles and birds, which is. Fig. 480.—Croivn of the tooth of a deer, showing the enamel ere ecen ts.— After Owen. J"- C—. 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt
Size: 1542px × 1620px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879
