. The anatomy of the domestic animals . Veterinary anatomy. 398 DIGESTIVE SYSTEM OF THE HORSE Infundihulum Central enamel Dentine Peripheral eiiamel Cement alveolus, so that the masticatory surfaces of the first and second lower incisors are at first oval, with the long diameter transverse; later—at about fourteen years usually for the first lower incisors—they are triangular, with the base at the labial edge. At the same time the infundih- ulum or "cup" becomes smaller, approaches the Ungual border, and finally disappears; it remains longer on the upper incisors, as it is-deeper in
. The anatomy of the domestic animals . Veterinary anatomy. 398 DIGESTIVE SYSTEM OF THE HORSE Infundihulum Central enamel Dentine Peripheral eiiamel Cement alveolus, so that the masticatory surfaces of the first and second lower incisors are at first oval, with the long diameter transverse; later—at about fourteen years usually for the first lower incisors—they are triangular, with the base at the labial edge. At the same time the infundih- ulum or "cup" becomes smaller, approaches the Ungual border, and finally disappears; it remains longer on the upper incisors, as it is-deeper in them. Another marked feature in old age is the progressive approach to a horizontal direction as seen in profile;- at the same time the exposed crowns of the teeth become parallel and finally convergent. Canine Teeth.—These are four in number in the male; in the mare they are usually absent or rudi- mentary.^ They interrupt the interdental space, dividing it into unequal parts. The upper canine Peripheral enamel Cement Dentine ~ Central enamel- Cement-,. Fig. 338.—Longitudinal Section of Lower Incisor Tooth of Hohsb. C, Pulp cavity. Cement is shown in the infundihulum, but is not marked. Fig. -Cross-section of Lc /, Infundihulum. or Tooth of Horse, is situated at the junction of the premaxilla and the maxilla; the lower canine is nearer the corner incisor. The canines are simple teeth, smaller than the incisors,. 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 Sisson, Septimus, 1865-1924. Philadelphia ; London : W. B. Saunders Company
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